2．My older brother and I are busy (61)arranging a trip to Africa．We will leave London on 15July.and ——青夏教育精英家教网—

2．My older brother and I are busy （61）arranging （arrange） a trip to Africa．We will leave London on 15July，and we'll be flying to Morocco．We are going to travel on camels （62）through the Sahara Desert．After the trip by camel，we're going to travel down the River Nile．We'll start at Lake Victoria．A little way down the river from Lake Victoria，the water （63）actually （actual） gets quite rough．So，we'll go white-water rafting，（64）which is quite dangerous，but very exciting!After white-water rafting，we're going on a trip to see wild animals in Kenya．
（65）Sincewe'll be walking for almost two weeks，I'll need to buy a large，strong，light backpack （66）in advance to carry my （67）supplies（supply） of food and water．It is so dangerous that our guides will have guns （68）to scare（scare） the animals away if they come too near．I really want to see（69）anelephant close up．After that，we'll be moving on to Tanzania，（70）where we're going to climb Mount Kilimanjaro．The African part of our trip will take about four weeks and we will surely have a happy time．

1．It is a tall tale that terrifies most young children．Swallow a piece of chewing gum and it will remain in your body for seven years before it is digested．Or so they say．An even worse tale is that swallowed gum can wrap itself around your heart．
But what does happen if you should accidentally eat a stick of gum？Chewing gum is made out of gum base，sweeteners，coloring and flavoring．The gum base is pretty indigestible-it is a mixture of different ingredients（成分）that our body can't use．
Most of the time，your stomach really cannot break down the gum the way it would break down other foods．However，your digestive system has another way to deal with things you swallow．After all，we eat lots of things that we are unable to fully digest．They keep moving along until they make it all the way through the gut（肠子）and come out at the other end one to two days later．
The saliva（唾液）in our mouths will make an attempt at digesting chewing gum as soon as we put it in our mouths．It might get through the shell but many of gum's base ingredients are indigestible．It's then down to our stomach muscles-which contract and relax，much like the way an earthworm moves-to slowly force the things that we swallow through our systems．
Swallowing a huge piece of gum or swallowing many small pieces of gum in a short time can cause a blockage within the digestive system，most often in children，who have a thinner digestive tube than adults-but this is extremely rare．
28．A child might feel terrified after swallowing chewing gum mainly becauseC．
A．their heart will be wrapped by chewing gum
B．chewing gum will stay in their body for many years
C．they believe the tall tales about chewing gum
D．chewing gum is indigestible for children
29．What happens to the food that can't be fully broken down？B
A．It remains in our digestive system forever
B．It will be eventually moved out of our body
C．It will fight against the power of the gut
D．It will stick to the gut for one or two days
30．The word"It"（in the 4^th paragraph） refers to"B"．
A．the attempt
B．the saliva
C．the shell
D．the gum base
31．What would be the best title for text？A
A．Does swallowing chewing gum matter？
B．Can chewing gum be swallowed by kids？
C．How does our digestive system work？
D．Why swallowing chewing gum frightens kids？

20．我们应该对帮助过我们的人常怀感恩之心．（grateful）We should be grateful to the people who have helped us．．

19．据说一些地方官员与这起案子有牵连．（involve）It is said that some local officials areinvolved in the case．．

18．只有通过采取有效措施我们才能保护自然资源．（Only； preserve）Only by taking effective measures can we preserve natural resources．．

17．中秋节吃月饼的习俗追溯到元朝（the Yuan Dynasty）．（date）．The custom of eating moon cakes at/during the Mid-autumn Festival dates back to the Yuan Dynasty．．

16．起源于中国，茶在中国的文献中被描述为一种延年益寿的健康饮品．（originate）Originating in China，tea was described in Chinese texts as a health drink that made one live longer．．

15．这个素食者似乎以面包和土豆为主食．（seem）The vegetarian seems to live on bread and potatoes．．

14．对于大多数英语节参赛者来说，他们所学到的东西比比赛本身更重要．（For）For most competitors/contestants in the English Festival，what they have learned is more important than the competition．

13．将来无人机（drones）是否会被用来送货上门，这有待见证．（remain）It remains to be seen whether drones will be used to deliver goods to your door in the future．．

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