题目内容

He will choose to send his daughter to this kindergarten ____she doesn’t have to get up so early.

A. lest
B. as long as
C. in case
D. while

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It may be three or five years _______ it is possible to test thismedicine on human patients according to scientists.

A. since
B. before
C. after
D. when

A company cannot operate efficiently _______ it is free from suchinterference.

A. so long as
B. so that
C. unless
D. because

It wasn’t such a good party _______ the host had promised us.

A. that
B. which
C. as
D. what

游离型Down综合征为( )染色体数目畸变

A. 单体型
B. 三体型
C. 单倍体
D. 三倍体
E. 多倍体

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