—Mary，I don’t know ____ you can come tomorrow morning.—No problem! I’ll be here
题型：不详难度：来源：
—Mary，I don’t know ____ you can come tomorrow morning.
—No problem! I’ll be here _____I’m free then.| A．if；if | B．if; whether | C．whether；till | D．whether；until |
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答案
| A |
解析
试题分析：if是否，如果；whether是否；till直到；until直到，常和not搭配使用；句意：玛丽，我不知道明天上午你是否能来。——没问题。如果那时候，我有空，我会到这儿的。结合语境可知上文为宾语从句，下文为条件状语从句，故选A。 |
举一反三
------I will hold on to my dream _________ there are so many difficulties.
------Never give up, and you will be successful.| A．because | B．until | C．although | D．unless |
|
----_______ go to the cinema together with me?
---- Good idea!| A．How about | B．Why do you | C．Why not | D．What about |
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—— Hurry up. The bus is coming!
—— Oh, no, we mustn’t cross the street ______ the traffic lights are green.| A．after | B．since | C．when | D．until |
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David lives a very simple life ____ he has a lot of money.| A．though | B．because | C．if | D．and |
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| Uncle Tetsu（彻思叔叔）cheese cakes sell well____they are so nice. |
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