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