A.A. may
B.B. need
C.C. ought to
D.D. must
第1题
in the last twenty years.
A. takes
B. took
C. have taken
D. should taken
第2题
It will not be long before everyone___the importance of computer skills at work.
A. will see
B. have seen
C. sees
D. would see
第3题
The problem of global warming___for decades.
A. has been existed
B. has existing
C. being existed
D. has existed
第4题
Lowering personal production of waste___everyone over the past decade.
A. benefited
B. has benefited
C. benefits
D. benefiting
第5题
Let everybody___something to reduce environmental pollution.
A. do
B. to do
C. doing
D. do it
第6题
ng carbon footprints.
A. will often see
B. often see
C. are often seeing
D. have often seen
第7题
___good care, the electrical devices in the area all work well.
A. Regarding
B. Thanks to
C. Like
D. Thanks for
第8题
If the lights were on, they___have been at home.
A. must
B. need
C. shall
D. would
第9题
The guest presented ______ that a staff in the hotel had stolen her pack.
A.proof
B.proofs
C.prooves
D.proofes
第10题
The manager demands that I meet five ___ at the exhibition tomorrow.
A.Australians
B.Australia
C.Australias
D.Australian
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