I’m only brave when I have to be. __________ doesn’t mean you go looking for trouble.

A．To have been brave                      B．Having been brave

C．Being brave                            D．Be brave

Considering that she did her work ______ her manager had instructed, it was not proper to criticize her.

A．as               B．until              C．when             D．though

The Spring Festival is our traditional festival, __________ people usually visit their friends and relatives.

A．for which         B．to which          C．during which       D．about which

__________ in the fields on a March afternoon, he could feel the warmth of spring.

A．To walk           B．Walking           C．Walked           D．Having walked

During the 1960s, songs about winter ___________ by many famous rock groups were popular among people of different ages.

A．released                              B．being released

C．releasing                              D．having been released

Passengers on board aren’t allowed _____ calls during take-off.  

A．making or receiving                     B．having made or received

C．to have made or received                 D．to make or receive

Do you know ______________ had reported the accident to the police?

A．who it was that     B．who was it that      C．it was who that     D．that it was who

More and more Chinese people follow the practice ______ they will travel to various scenic spots to enjoy the scenery in their leisure time.

A．whether          B．which            C．where            D．that

______________ that my dearest friend would play a trick on me in front of all my students.

A．Never I thought                         B．Never did I think

C．I thought never                         D．Never thought I

Complete the following passage by using the words in the box. Each word can only be used once. Note that there is one word more than you need.

A. roots      B. but     C. covered     D. reproduce   E. energy

F. probably  G. gaining  H. surrounding  I. supplied     J. life

Life on land probably began about 430 million years ago, though it has existed in the water for perhaps as much as 3,000 million years. When we think of the first     1    on land, we     2   think of strange animals coming out of the oceans, but, in fact, no animals could have been living if plants had not been on land first. Plants had to be on land before animals arrived. They    3   the first land animals with the    4   and food necessary, since they ---the plants are the only form of life that is able to get and store    5    .

The first plants to exist out of the water were probably certain kinds of algae （ 藻类 ）which were followed by other plants that grew close to the ground and needed water in which to    6  . Once the move to land has been made, however, evolution took place quickly. By the end of 100 million years, plants had developed their    7  , and some have got tree-like forms since height was very important in    8   sunlight. About 300 million years ago, much of the world was     9   with forests of huge trees. In most ways they were like modern trees. They had roots, leaves, wood, but mostly they had not developed seeds.