最好加说明1.I_____a glass while I_______the dinner yesterday.A.ha

最好加说明
1.I_____a glass while I_______the dinner yesterday.
A.had broken ,was cooking
B.broke ,was cooking.
2.The dog_____her on the leg when she ___it.
A.bit ,was catching.
B.bit ,caught
3.Where is John?
He ___ to town for two hours.
A.has gone
B.has been away
4.Let's hurry.The film will begin soon.
Oh,yes,but i ___afraid that it___.
A.was,had already begun.
B.am ,has already begun
5.The population in China___to one and a half billon by the year.
A.will be increase.
B.will have increased.
6.Hello!Glad to meet you here.I ____you ____in London too.
A.didn't know,were.
B.don't know ,are
1.B
2.B
3.B(已懂)
4.A
5.B
6.A

1.B,只是陈述过去发生的事情,没必要用过去完成时
2.A 当他牵的它的时候,咬了她
3.B go是短暂性动词,不能与two hours 连用
4.B 我现在的感觉
5.B 有by 加一段时间时一般都用完成时态
6.A 我不知道是过去的事情,现在知道了