He had to sell his luxury car, ________ his company was in debt.
| A．before | B．until |
| C．while | D．for |
Jane had just finished her homework ________ her mom asked her to practice playing the violin yesterday.
| A．when | B．while |
| C．after | D．before |
______ environmental damage is done，it takes many years for the ecosystem to recover．
| A．Even if | B．If only |
| C．As if | D．Once |
We won’t keep winning games we keep playing well.
| A．because | B．unless | C．when | D．while |
__________ something unexpected happens，I will meet you at the school gate tomorrow
morning.
| A．When | B．Unless | C．Since | D．If |
Some experts believe ________ our personalities are largely determined by genetic factors.
| A．that | B．whether | C．what | D．how |
The hikers made marks on the way ________ they wouldn’t get lost in the mountain.
| A．as if | B．so that | C．even though | D．in case |
Some people get in touch with each other by mobile phones__________ others keep contact with each other by e-mail.
| A．when | B．before | C．while | D．since |
It’s much easier to make friends ____ you have similar interests.
| A．unless | B．when |
| C．even though | D．so that |
Our government has promised to improve our water quality, so it won’t be long _______ the residents can have access to clean water.
| A．after | B．since | C．before | D．unless |
He was on the point of setting off for Shanghai ____ his girl friend called him.
| A．when | B．while | C．as | D．before |
The patient in hospital is ready to accept ____ help she can get.
| A．wherever | B．whatever | C．however | D．whenever |
The unquestioned role of students is to learn as much as possible through ________ method they find.
| A．whichever | B．whatever |
| C．no matter what | D．no matter which |
Susan's voice still remained calm ______ she was getting annoyed．
| A．even if | B．as long as |
| C．as if | D．now that |
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