选哪一个？为什么，请详细写出其余选项为什么不对！谢谢
1.-Will you come over to my house?【 这2句话是什么意思？】
-I won't unless Tom __ . A.is invited B.will be invited
C.was invited D.invited
2.I couldn't agree with __ at the meeting. A.that you said B.what you said
3.___ of them has his own opinion. 【 这句话是什么意思？】 A.Every B.Each【它们之间有什么区别?】
4.Most of his money ___ in the Xin Hua Bank A.has been kept B.is being kept
5.All that can be done ___ 【 这句话是什么意思？】 A.has done B.has been done C.have done D.have been done
用所给动词的适当形式填空 请写出原因 谢谢
1.Ten divided by 2 __ ( be ) 5
2.The number of people invited was 50, but a number of them __ (be)sbsent for different reasons.
3.In 1850,about a third of U.S.A__ (be) covered by forests.