题目内容
---We can’t get good grades ______ we study harder.
---I agree. That’s why I study so hard.
A. because B. if C. unless
C
解析试题分析：because因为；if是否，如果；unless除非，如果不。句意：如果我们不努力学习我们就不能取得好成绩、——我同意这种看法。那就是我为什么这么努力学习了。结合语境可知选C。
考点：考查连词辨析
---How was your climb up Mount Tai?
---I didn’t believe I could do it I got to the top．
| A．until | B．unless | C．after | D．when |
Don't eatjunk food, it's bad for your health.
| A．because | B．if | C．though | D．so |
— Could we practice playing the guitar in the hall, Sir ?
—No , ___________ you have the principal’s (校长) note.
| A．if | B．unless | C．because | D．since |
_____Peter____ Bill is good at sports. They both play basketball really well.
| A．Either; or | B．Not only; but also |
| C．Both; and | D．Neither; nor |
My sister ______ go to bed _______ my mother came back last night.
| A．not until | B．doesn't; until | C．didn't; until | D．aren't; until |
Although it was very cold, he went out without an overcoat.
| A．but | B．/ | C．and | D．so |
Martian Brother is the nickname for a boy called Hua Chenyu won the 2013 Supei Boy．
| A．who | B．which | C．whose | D．what |