题目内容
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In recent years, a number of communication satellites ______ into orbit about the earth.
A．have been put
B．has been put
C．are already put
D．have been putting
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A．compound word
B．derivation
C．adverb
D．conjunction
In recent years, there have been over 30 foreign companies______business in this city.
A．doing
B．do
C．to do
D．done
Not until recent years ______ a popular means of communication.
A．e-mail became
B．e-mail has become
C．did e-mail become
D．will e-mail become
The milder winters of recent years make the pine beetle population ______.
A．decrease
B．increase
C．keep in check
D．change
In recent years, ______ is the main problem with housing.
A．the deterioration of housing conditions
B．the shortage in housing
C．the failures of construction programs
D．the reduction of housing subsides
A．result
B．climax
C．abyss
D．cultivation
In recent years there has been a ()increase in the cost of living; many familiar have to depend on the federal aids.
A、significant
B、violent
C、powerful
D、ponderous
Only in recent years ______ (人们才认识到节约用水多么重要).
A.264days
B.195days
C.239days
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