The foreign student advisor recommended that she studied more English before en­rolling at the university
A.foreign
B.studied
C.en­rolling
D.the

Thanks to new techniques, canning goods now have a much longer shelf life.
A.Thanks to
B.techniques
C.canning goods
D.a much longer

The swirling winds of a tornado can reach quickly speeds close to 300 miles per hour.
A.swirling winds
B.reach quickly
C.close to
D.per hour

The teacher gave some suggestions on what could come out for the examination.
A.effects
B.symptoms
C.hints
D.demonstrations

__________(41)
A.insists
B.wishes
C.requires
D.asks

__________(43)
A.a ratio
B.a measure
C.an average
D.a proportion

__________(44)
A.appear
B.refer
C.indicate
D.comprise

__________(46)
A.discard
B.vanish
C.evaporate
D.ease

__________(47)
A.linger
B.maintain
C.persist
D.remain

__________(48)
A.search
B.chase
C.lookout
D.survey