The scientist does not study nature ________ it is useful to do so. He studies it because he takes pleasure in it.
| A．until | B．though |
| C．because | D．Unless |
Some hard working students always keep a torch in their dormitories _____ there is a power failure．
| A．if | B．unless |
| C．so that | D．in case |
There are as many as five student clubs in our school．You can join _____ interests you most．
| A．whatever | B．whichever |
| C．whenever | D．wherever |
Mary has her weakness, ___________ that doesn’t mean she is not qualified for her job.
| A．and | B．yet | C．so | D．or |
Wonderful Friends, a show on Hunan TV, is about _________people get along with animals．
| A．how | B．what | C．why | D．who |
__________most people come here for skiing, there are plenty of other things to do．
| A．Although | B．Once |
| C．Since | D．If |
We can’t figure out ______ quite a number of insects and birds are dying out．
| A．that | B．as | C．why | D．when |
Spending a few hours learning about the history and culture of the destination will help tourists understand they're seeing
| A．what | B．where |
| C．that | D．why |
—How are you getting along with your German, Kate？
—Oh, Mr．Black, I’m so tired of it．Maybe I should drop out _____ it kills me．
| A．when | B．after | C．while | D．before |
She doesn’t speak our language, _____ she seems to understand what we say．
| A．for | B．and | C．yet | D．or |
_____ he promised that he wouldn’t be late，he didn’t arrive until the end of the party．
| A．Since | B．Although |
| C．Because | D．Until |
______ we have planned ahead might change when we put it into practice．
| A．Whatever | B．Whenever |
| C．Whoever | D．However |
_____________ hard you try，it is difficult to lose weight without cutting down the amount you eat.
| A．Whichever | B．Whatever | C．However | D．Whoever |
------Do you know anything about China’s space program?
------Yes, ________ I know, China will send woman astronauts into space in the near future.
| A．As long as | B．So far as |
| C．As much as | D．As soon as |
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