请给出为什么选某一选项的解释,

请给出为什么选某一选项的解释,
1.He acted in all kinds of plays,but he was ____his best in comedy.
a.in
b.on
c.off
d.at
2.None of us like those new rules,but we have to_________it.
a.live on
b.live with
c.live up to
d.live through
3.The mayor reassured the citizens that he would try his best to
_________the city after the murder.
a.clear up
b.clean up
c.dry up
d.sweep up
4.I know a lot about basketball,but_________baseball I could say nothing.
a.when coming to
b.when comes to
c.coming to
d.when it comes to
5.The committee _________ten men and three women will discuss this problem tonight.
a.consisted of
b.consisting of
c.composing of
d.making up of
6.It took Jack a long time to _________the fact that he could never become a famous writer.
a.come up with
b.come to terms with
c.come up to
d.come through
7.Last week,Tom was_________for criticism by our teacher.a.singled out
b.picked out
c.worked out
d.figured out
8.The building of the nuclear power station has to be _________ because of the local citizens’ protest against it.
a.set off
b.set down
c.set back
d.set up
9.The proposal _________building a new library was put forward by
seven members.
a.as to
b.as of
c.as from
d.as on
10.It’s hard to find any _________slop in this hilly area.
a.empty
b.hollow
c.bare
d.open