题目内容
You won't work out the problem ______ you understand it. So listen to me explain now.
| A．since | B．when |
| C．unless | D．though |
C
解析试题分析：句意：除非你理解了这道题，你不会做出它的。所以现在听我讲解。since自从，when
当……的时候，unless除非， though尽管。根据语境可知是如果不明白就无法解答这道题，故选C.
考点：考查连词辨析
名校课堂系列答案You should go to bed early, ____________you will feel tired in the morning.
| A．or | B．but | C．and | D．so |
I’m going to take him to some famous hutongs_______ he can learn more about China.
| A．because | B．when |
| C．so that | D．as if |
--What is our physics teacher like, do you know?
--Oh, he is very kind _________ he looks very serious.
| A．because | B．though |
| C．if | D．when |
— Look at the problem! it’s very difficult, I have worked it out.
— Good job.
| A．Although; / | B．Because; so |
| C．Because; / | D．Although; but |
My friend’s plane had taken off I got to the airport to see him off.
| A．until | B．while |
| C．after | D．before |
Foreign visitors will get lost easily in new Taixing ________ they have a map.
| A．until | B．if |
| C．whether | D．unless |
Where is Class________ ?
It’s on the ______ floor.
| A．Six: third | B．Sixth; third |
| C．Six; three | D．Sixth; three |