题目内容
It never will rain roses. __________ we want to have more roses. we must plant trees.
| A．When | B．Unless | C．Until | D．While |
A
解析试题分析：句意：天上不会掉下玫瑰来，如果想要更多的玫瑰，必须自己种植。这里用when“当…时候，如果”，unless“除非，如果不”，until“直到”，while“当…时候，然而，虽然”，根据句意选A。
考点：考查连词辨析
----Dad, can I go out to play basketball now ?
----- Sorry, you can’t ______you haven’t finished your homework.
| A．before | B．until | C．as | D．unless |
Our English teacher spoke very clearly ________we could hear every word. ( )
| A．so that | B．now that | C．as soon as | D．in case |
I have been advised to arrange for insurance _________ I need medical treatment.
| A．so that | B．unless | C．in case | D．though |
The so-called Asia—Pacific century will make no sense_____ China develops．
| A．unless | B．when | C．if | D．as |
I was about to go out ________ it began to rain.
| A．when | B．as | C．since | D．while |
I was glad to meet Jerry again, ________ I couldn’t wait to spend all day with her.
| A．but | B．and | C．so | D．or |
____ he had not hurt his leg, John would have won the race.
| A．If | B．Since | C．Though | D．When |