1.They can't have thought that i was at home then,a.did they b.have they c.do they d.was i2.-He hasn't finished yet.-well,he ought_.a.not have to b.to have c.not to d.to3.-i find lily _fatter of the two.-really?and she is _ shorter of the two.a./,/ b.the,the c./,the d.the,/4.after the party ,shi found her nacklace gone ,and never_again.a.be found b.being found c.to found d.found第一题,have thought否定应该是haven't thought .本来是否定的,所以不是应该用have they吗?其它几道题目要选择的理

1.They can't have thought that i was at home then,
a.did they b.have they c.do they d.was i
2.-He hasn't finished yet.
-well,he ought_.
a.not have to b.to have c.not to d.to
3.-i find lily _fatter of the two.
-really?and she is _ shorter of the two.
a./,/ b.the,the c./,the d.the,/
4.after the party ,shi found her nacklace gone ,and never_again.
a.be found b.being found c.to found d.found
第一题,have thought否定应该是haven't thought .本来是否定的,所以不是应该用have they吗?
其它几道题目要选择的理由.