A.before I came home after work
B.after I had came home after work
C.while I was coming home after work
D.when I come home after work

A.It was not Steve who stole the money.
B.Steve is thought to have stolen the money.
C.Many people think the money is stolen by Steve.
D.The money is thought to be stolen by Steve.

A.It was not Steve who stole the money.
B.Steve is thought to have stolen the money.
C.Many people think the money is stolen by Steve.
D.The money is thought to be stolen by Steve.

A.I have not been to the museum for a year.
B.A year ago, I often went to the museum.
C.My going to the museum lasted a year.
D.At last I went to the museum after a year.

A.to be asking
B.to be asked
C.being asking
D.of asking

A.is going to be performed
B.has been performed
C.will be performing
D.will have performed

A.had left / forgot
B.was leaving / was forgetting
C.left / had forgot
D.had been leaving / would forget

A.was trying / slipped / fell
B.tried / was slipping / falling
C.had been trying / slipped/ was falling
D.has tried / slips / falls

A.see / am walking
B.saw / was walking
C.was seeing / walked
D.have seen / were walking

A.wouldn’t
B.oughtn’t
C.needn’t
D.couldn’t