【单选题】【消耗次数：1】
The experiment_________ in the lab now.
①
was done
②
is being done
③
has been done
④
is doing
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相关题目
【单选题】
They have done things they ought_____.
①
not to do
②
not to be done
③
not to have done
④
not having done
【单选题】
A: Could you put the books on bookshelves, please? B: Of course. [填空] A: Thats all. Everything else has been done.
①
Its a pleasure to help.
②
Is that all?
③
Im free now.
④
How should I do it?
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Now soil in this area is [填空] than it used to be. Something must be done to it.
①
very good
②
much better
③
rather than
④
even worse
【单选题】
Of course she ___________ what youve done.
①
is pround of
②
finds a way
③
takes off
④
fights for
【单选题】
Well done. Congratulations on your success.
①
Thank you very much
②
Oh, no, no
③
No, I didn’t do very well
④
Sorry, I couldn’t any better
【单选题】
That’s all prepared. It _______done more.
①
shouldn’t
②
mustn’t be
③
dont need to be
【单选题】
Can anything be done to_________ the negative influence of some television programs?
①
accept
②
assume
③
avoid
④
alarm
随机题目
【单选题】
输入序列为ABC，可以变为CBA时，经过的栈操作为（ ）。
①
push,pop,push,pop,push,pop
②
push,push,push,pop,pop,pop
③
push,push,pop,pop,push,pop
④
push,pop,push,push,pop,pop
【单选题】
最大容量为n的循环队列，队尾指针是rear，队头是front，则队空的条件是（ ）。
①
(rear+1) % n==front
②
rear==front
③
rear+1==front
④
(rear-1) % n==front