A.whom
B.whose  
C.that  
D.which

A.what
B.which 
C.where
D.that

A.whose
B.who 
C.whom
D.that

A.who
B.whom
C.him
D.that

A.must
B.need
C.ought
D.might

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

A.could have helped
B.might help
C.would help
D.can help

A.were injured
B.are injured
C.was injured
D.have been injured

A.chosen
B.have been chosen
C.has been chosen
D.were choosing

A.2
B.3
C.4
D.5