Many people still refused to believe that smoking__________dangerous.

A.be
B.is
C.are
D.been

Living in the city is getting__________.
A.more expensive and expensive
B.more expensive and more expensive
C.expensive and expensive
D.more and more expensive

He spends__________time on his work.
A.much and much
B.more and more
C.more and much
D.many and many.

She__________to me since last year.
A.has not written
B.wrote
C.writes
D.had not written

We avoid__________our environment.
A.polluted
B.polluting
C.pollute
D.to pollute

If you hate cleaning this fish, why don’t you__________it cleaned at the fishmonger’s.

A.make
B.ask
C.order
D.have

______(44)
A.the
B.that
C.an
D.a

______(45)
A.because
B.however
C.if
D.unless

All forms of exercise must be started__________.
A.quickly
B.gradually
C.strenuously
D.violently

People with back problems might go cycling because__________.
A.it enables them to carry the weight of their body on their feet
B.it helps them to relieve their backache
C.it helps to make their backs become stronger
D.it does not make them carry the weight of their body on their feet