My parents live in a small village. They always keep candles in the house ___ there is a power cut.
| A．if | B．unless | C．in case | D．so that |
It is difficult for us to learn a lesson in life _____we’ve actually had that lesson.
| A．until | B．after | C．since | D．when |
—Where’s that report?
—I brought it to you ____you were in Mr. Black’s office yesterday.
| A．if | B．when | C．because | D．before |
_____he had not hurt his leg, John would have won the race.
| A．If | B．Since | C．Though | D．When |
I won’t call you, ________ something unexpected happens.
| A．unless | B．whether | C．because | D．while |
Don’t promise anything ______ you are one hundred percent sure.
| A．whether | B．after | C．how | D．unless |
We’ll have a picnic in the park this Sunday _________ it rains or it’s very cold.
| A．since | B．if | C．unless | D．until |
There were some chairs left over _____ everyone had sat down.
| A．when | B．until | C．that | D．where |
For many cities in the world, there is no room to spread out further, _______ New York is an example.
| A．for which | B．in which | C．of which | D．from which |
I haven’t seen Ann for ____ long that I’ve forgotten what she looks like.
| A．such | B．very | C．so | D．too |
My parents were quarrelling about me ____ I could not quite tell why．
| A．since | B．though | C．if | D．until |
A dozen ideas were considered____the chief architect decided on the design of the building．
| A．because | B．before | C．whether | D．unless |
Pop music is such an important part of society ______ it has even influenced our language.
| A．as | B．that | C．which | D．where |
．_____I really don’t like art, I find his work impressive.
| A．As | B．Since | C．If | D．While |
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