【单选题】【消耗次数：1】
21. — When will you leave for Paris for a visit? — next month.
①
Until
②
After
③
At
④
In
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【单选题】
21.—I went to visit Xi`an City Wall yesterday afternoon. ---Oh, did you ? _______.
①
SodidI
②
SoIdid
③
NeitherdidI
④
NordidI
【单选题】
21. Thinking that you know ____ in fact you don’t is a disastrous mistake.
①
what
②
that
③
when
④
however
【单选题】
A: When does the next train for London leave? B: Theres one leaving at 8 oclock. A: [填空]
①
Are you sure?
②
OK. I dont want to be late.
③
Thanks. Could you wait for me?
④
Id like one ticket, please.
【单选题】
They can’t leave until they _________ their work .
①
did
②
are doing
③
have done
④
his done
【单选题】
They can’t leave until they _______ their work .
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【单选题】
---When do you wish to visit Canada?---- _____________I am settled, I’ll go there.
①
As
②
Since
③
Once
④
While
【单选题】
They can’t leave until they ___ their work.
①
did
②
are doing
③
have done
④
has done
【单选题】
21. Am I _____ your way? I can move over a bit and make room for you...
①
under
②
in
③
beyond
④
on
【单选题】
By the end of next month we ____ this assignment.
①
will finish
②
will be finishing
③
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④
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随机题目
【单选题】
以太网线路利用率，说法错误的是（）
①
要提高以太网的信道利用率，就必须减小?与T0之比
②
以太网的帧长不能太短，否则利用率会太低。
③
当以太网的利用率达到30%时就已经处于重载的情况。
④
只有当参数a远大于1才能得到尽可能高的极限信道利用率。