题目内容
______ he got ready to leave home, his parents came to his home.
| A．While | B．As | C．Until | D．If |
B
解析试题分析：句意：正当他准备离家的时候，他父母到了他的家。 As表示正当一个动作发生的时候，另一个动作也发生了。故选B。
考点：考查连词的用法。
练习册系列答案
相关题目
------Did you give Tom a call?
-------I didn’t need to,____________I’ll see him soon.
| A．when | B．though | C．until | D．because |
I’m not sure if he _____ me . If I ________ , I will go with you.
| A．will invite; will be invited | B．will invite; am invited |
| C．invite; will invite | D．invite; invite |
People along the river didn’t allow them to ______ a factory so as not to pollute the water.
| A．set up | B．give up | C．take up | D．look up |
—Oh! I failed again.
—Don’t lose heart. One more effort (努力), _________ you will succeed.
| A．so that | B．since | C．however | D．and |
My brother has been teaching ________ he was 21 years old.
| A．when | B．if | C．for | D．since |
He made a mistake, but then he took action to change the situation ________ it got worse.
| A．until | B．when | C．before | D．because |