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[单选题]

For a long time scientists have suspected （) life exists on other planets besides the earth, but until recently, they had very little evidence to support this theory.

A.whether

B.if

C.that

D.what

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更多“For a long time scientists hav…”相关的问题

第1题

There was such a long time at the exhibition()we had to wait for about half an hour。

A.as

B.that

C.so

D.hence

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第2题

_____ do you meet each other？

A.how many days

B.how often

C.how long

D.how much time

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第3题

A cut in the tissue is easy to heal but a（an) （) to the heart, if possible, takes a long time to do so.

A. morale

B. extension

C. caution

D. wound

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第4题

The little girl must have lain there for a long time, ___________？

A.musn’t she

B.hasn’t she

C.wasn’t she

D.didn’t she

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第5题

-__ have been in this city?- For about two weeksA. How oftenB. How longC. How so

-__ have been in this city？ - For about two weeks

A. How often

B. How long

C. How soon

D. What time

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第6题

____a type of infectious disease,which takes a long time to get over.

A.The mumps is

B.Mumps are

C.Mumps is

D.The mumps are

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第7题

_____ for a long time, but he tried his best to catch up with his classmates.

A.Having been ill

B.Being ill

C.He was ill

D.Though he was ill

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第8题

__________ he does his work hard, I don‟t mind what time he arrives atthe office.

A.Meanwhile

B.In case

C.So long as

D.So far as

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第9题

jetlag的意思是:extreme tiredness and other physical effects felt by a person after a long flight across different time zones

T.对

F.错

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第10题

You（）be tired;you have been working for so long a time,but he（）be tired;he has just begun to work.

A.may not,must

B.must,may not

C.can't must

D.must can't

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第11题

三大引文索引包括（)

A.CNKI

B.SCIE

C.SSCI

D.AHCI

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