`1` A
`->` Câu BD thì HTTD
S + is / are/ am + Vpp+ by + O + ...
`2` C
`->` Câu BD thì HTHT
S + has / have + been + Vpp+ by + O ..
`3` D
`->` Câu BD với model verbs
S + model verb+ be + Vpp+ by + O
`4` B
`->` Câu BD thì QKD
S + was / were + Vpp+ ...
`5` D
`->` Câu BD thì QKD
S + was / were + Vpp+ ...
`6` A
`->` Câu BD thì QKD
S + was / were + Vpp+ ...
`7` D
`8` C
`->` Câu BD thì QKD
S + was / were + Vpp+ ...
`9` A
`->` Câu BD với model verbs
S + model verb+ be + Vpp+ by + O
