Few people paid full attention to their health conditions _____ they were seriously ill.
A.when B.if C.until D.before
John thinks it won’t be long ______he is ready for his new job .
A.when B.after C.before D.since
_____ he came to study in the university, he has made much progress in the study of English.
A.While B.When C.Since D.After
I had to buy _____ of these books because I didn’t know which one was the best.
A.both B.none C.neither D.all
It is polite _____ you to give your seat to the old man on the bus.
A.for B.to C.of D.about
假定你是校排球队队长李华。请写封邮件告知你的队友Chris球队近期将参加比赛，内容包括:
1. 比赛信息；
2. 赛前准备；
3. 表达期待。
注意:
1. 词数100左右；
2. 可以适当增加细节，以使行文连贯。
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