7．Scientists have advanced many theories about why human beings cry tears.none of has been pr——青夏教育精英家教网——

7．Scientists have advanced many theories about why human beings cry tears，none of ______ has been proved．（　　）

6．That young man is honest，cooperative，always there when you need his help．______，he's reliable．（　　）

5．_______online shopping has changed our life，not all of its effects have been positive．（　　）

California Condor's Shocking Recovery
California condors are North America's largest birds，with wind-length of up to 3 meters．In the 1980s，electrical lines and lead poisoning（铅中毒） nearly drove them to dying out．Now，electric shock training and medical treatment are helping to rescue these big birds．
In the late 1980s，the last few condors were taken from the wild，and there are now more than 150flying over California and nearby Arizona，Utah and Baja in Mexico．
Electrical lines have been killing them off．"As they go in to rest for the night，they just don't see the power lines，"says Bruce Rideout of San Diego Zoo．Their wings can bridge the gap between lines，resulting in electrocution（电死） if they touch two lines at once．
So scientists have come up with a shocking idea．Tall poles，placed in large training areas，teach the birds to stay clear of electrical lines by giving them a painful but undeadly electric shock．Before the training was introduced，66% of set-freed condors died of electrocution．This has now dropped to 18%．
Lead poisonous has proved more difficult to deal with．When condors eat dead bodies of other animals containing lead，they absorb large quantities of lead．This affects their nervous systems and ability to produce baby birds，and can lead to kidney（肾） failures and death．So condors with high levels of lead are sent to Los Angeles Zoo，where they are treated with calcium EDTA，a chemical that removes lead from the blood over several days．This work is starting to pay off．The annual death rate for adult condors has dropped from 38% in 2000 to 5.4% in 2011．
Rideout's team thinks that the California condors'average survival time in the wild is now just under eight years．"Although these measures are not effective forever，they are vital for now，"he says．"They are truly good birds that are worth every effort we put into recovering them．"

63．California condors attract researchers'interest because theyD．
A．are active at night
B．had to be bred in the wild
C．are found on in California
D．almost died out in the 1980s
64．Researchers have found electrical lines areB．
A．blocking condors'journey home
B．big killers of Califorbnia condors
C．rest places for condors at night
D．used to keep condors away
65．According to Paraghaph 5，lead poisoningD．
A．makes condors too nervous to fly
B．has little effect on condors'kidneys
C．can hardly be gotten rid of form condors'blood
D．makes it different for condors to produce baby birds
66．The passage shows thatC．
A．the average survival time of condors is satisfactory
B．Rideout's research interest lies in electric engineering
C．the efforts to protect condors bave brought good results
D．researchers have found the final answers to the problem．

3．Why didn't you tell me about your trouble last week？If you ___ me，I could have helped．（　　）

2．I really enjoy listening to music ___ it helps me relax and takes my mind away from other cares of the day．（　　）

1．Newly-built wooden cottages line the street，_______ the old town into a dreamland．（　　）

20．The students have been working hard on their lessons and their efforts______ success in the end．（　　）

	A．	rewarded		B．	were rewarded
	C．	will reward		D．	will be rewarded

The value-packed，all-inclusive
sight-seeing package that
combines the best of Sydney's
harbour，city，bay and beach
highlights．
A SydneyPass gives you unlimited and flexible travel on the Explorer Buses：the'red'Sydney Explorer shows you around our exciting city sights wlrile the'blue'Bondi Explorer visits Sydney Harbour bays and famous beaches．Take to the water on one of three magnificent daily harbour cru/ses（游船）．You can also travel free on regular Sydney Buses，Sydney Ferries or CityRail services （limited area），so you can go to every corner of this beautiful city．
Imagine browsing at Darling Harbour，sampling the famous seafood at Watsons Bay or enjoying the city lights on an evening ferry cruise．The possibilities and plans are endless with a SydneyPass．Wherever you decide to go，remember that bookings are not required on any of our services so tickets are treated on a first in，first seated basis．
SydneyPasses are avai-lable for 3，5 0r 7days for use over a 7calendar day period．With a 3or 5day pass you choose on which days out of the 7you want to use it．All SydneyPasses include a free Airport Express inward trip before starting your 3，5 0r 7days，and Lhe return trip is valid （育效的） for 2months from the first day your ticket was used．

SydneyPass Fares

	Adult	Child	Family
3 day ticket	90 dollars	45dollars	225dollars
5day ticket	120dollars	60dollars	300dollars
7 day ticket	140dollars	70dollars	350dollars

*A child is defined as anyone from the ages of 4years to under～6ye rs．Children   under 4years travel free．
**A family is defined as 2adults and any number of children from 4to under 16years of age from the same family．

69．A SydneyPass doesn7t offer unlimited rides onD
A．the Explorer Buses
B．the harbour cruises
C．regular Sydney Buses
D．CityRail services
70．With a SydneyPass，a traveller canA．
A．save fares from and to the airport
B．take the Sydney Explorer to beaches
C．enjoy the famous seafood for free
D．reserve seats easily in a restaurant
71．If 5-day tickets were to be recommended to a mother who travelled with her colleague and
her children，aged 3，6and 10，what would the lowest cost be？C
A.225．
B.300．
C.360．
D.420．

18．Only may cousin has chosen to apply for a job in Africa the majority of this year's graduates working in Britain．（　　）

0 135760 135768 135774 135778 135784 135786 135790 135796 135798 135804 135810 135814 135816 135820 135826 135828 135834 135838 135840 135844 135846 135850 135852 135854 135855 135856 135858 135859 135860 135862 135864 135868 135870 135874 135876 135880 135886 135888 135894 135898 135900 135904 135910 135916 135918 135924 135928 135930 135936 135940 135946 135954 151629