The boss made the workers---ten hours a day.A.work B.to work

1.The boss made the workers___ten hours a day.A.work B.to work C.working D.worked
make 后面不能接不定式,B错.workers工作是主动的,D错.从a day来看应当是日常的习惯性工作,所以用一般现在是WORK.所以选A
2.____you____next week?
A.Are;going to free B.Are;going to be free C.Are;going free D.Do;free
going to 表示将来时,所以C错 Next week 表示将来,D是一般现在时,不选.be free 表示空闲,所以只能选B
3.I think____necessary for us to learn English well.
It's necessary 是固定用法,所以选B
A.it B.its C.that D.that's
4.If Sandy____free tomorrow,I'll ask Andy____.
A.not;instead B.doesn't be;instead of C.isn't;instead D.isn't be;instead of
首先排除 instead of,因为of 后面要接宾语,这里没有.这是两个完整的分句,所以A错,选C
再问： 注意：第3题的B 选项its 不是it's
再答： 如果是这样的话只能选D。