21.They are looking forward to______to the lecture by the famous professor.( )
A.send B.be sent
C.being sent D.sending
22.I remember______for the job, but I forgot the exact amount.( )
A.to be paid B.that I receive pay
C.get paid D.being paid
23.He was a good swimmer, so he______swim to the river bank when the boat sank.( )
A.could B.might
C.should D.was able to
24.The classroom is empty.I think they______to the library.( )
A.should have gone B.ought to have gone
C.must go D.must have gone
25.I’m very keen on sports,______?( )
A.don’t I B.didn’t I
C.am not I D.aren’t I
26.Work hard,______you will fail in the exam.( )
A.although B.and
C.or D.unless
27.The doctor showed the new nurse______to do.( )
A.what B.that
C.how D.as
28.I still remember the place______he visited last year.( )
A.to which B.in which
C.that D.where
29.It was in______friendly a way that he talked with us.( )
A.such B.how
C.too D.so
30.Not only______polluted but______crowded.( )
A.was the city; were the streets B.the city was; were the streets
C.was the city; the streets were D.the city was; the streets were
