求助几道英语单选+讲解

求助几道英语单选+讲解
1.—How about eight o'clock outside the cinema?
—Taht____ me fine.
A.fits B.meets C.satisfies D.suits
2.Scientists say it may be five or six years____ it is possible to test this medicine on human patients.
A.since B.after C.before D.when
这道题为什么不能选A...
3.You should try to get a good night's sleep___ much work you have to do.
A.however B.no matter C.although D.whatever
4.___ with the size of the whole earth,the biggest ocean does not seem big at all.
A.Compare B.When comparing C.Comparing D.When compared
5.—George and Lucy got married last week.Did you go to their wedding?
—No,I___.Did they have a big wedding?
A.was not invited B.have not been invited C.hadn't been invited
D.didn't invite
这道题为什么不选A...
这五道题的答案是DCADC