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【单选题】
不需要立即更换口罩的是A.
口罩潮湿时
B.
隔离衣袖口触及口罩
C.
污染的手接触了口罩
D.
接触霍乱病人后
E.
为流行性感冒病人做保健指导后
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举一反三
【单选题】why didn't steven travel to visit his mother?
A.
he was busy
B.
he was free
C.
he bought a mobile phone to call her
D.
he was unemployed
【单选题】She wanted to know ________ [ ]
A.
why didn't I think it was a good idea
B.
why I didn't think it was a good idea
C.
why I thought it wasn't a good idea
D.
why did I think it wasn't a good idea
【单选题】The mason ______ I didn't do this exercise is I didn't know how to do it.
A.
why...because
B.
why...that
C.
for...that
D.
that...because
【单选题】( ) see the film this evening?
A.
Why don't we go to
B.
Why didn't we go to
C.
Why aren't we go to
【单选题】—Why didn't Alice come to the party last night? —I don't know ______. [ ]
A.
why didn't she
B.
why she didn't
C.
why did she
D.
why she did
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