求助英语大神帮我做几道题，在线等，谢谢

求助英语大神帮我做几道题，在线等，谢谢
1：We dare not play jokes on her ___________
she should become angry.
1.lest
2.unless
3.for fear of
4.so that
2：Please turn all the lights ______ as you
leave the classroom; we can’t afford to waste power.
1.down
2.at
3.off
4. on
3：The disease is spreading, and all the
children under five are ______ risk.
1.in
2.at
3.to
4.on
4：He was confident in the interview,
___________impressed most of us.
1.which
2.that
3.it
4.what
5：Rom admits that watching TV sometimes
distracts him ______ his homework.
1.out
2.off
3.from
4.in
6：See _____ it that you are not late
again.
1.at
2.on
3.to
4.out
7：They took ______ measures to prevent
poisonous gases from escaping.
1.fruitful
2.valid
3.beneficial
4.effective
8：Before I pay I’d like to know what I pay
______.
1. off
2.for
3.up
4.over
9：We insisted that nations should be treated
equal in international affairs ___________ the size and stage of the economic
development.
1.on account of
2.regardless of
3.in relation to
4.apart from
10：It does not alter the fact that he was
the man ____ for the death of the little girl.
1.accounting
2.guilty
3.responsible
4.obliged
11：Now the ______ between the rich and the
poor countries has become even wider.
1.bridge
2.gap
3.difference
4.comparison

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