单项选择题


A．carried on
B．carried out
C．carried through
D．carried off
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单项选择题
A．thusB．soC．thoughD．worse
A．thus
B．so
C．though
D．worse
单项选择题
The problem of undernourishment will become more critical because ______.
A．the world has spent a great deal on preparations for war
B．wealthy nations such as America would rather let surplus grain being uselessly destroyed than use it in relief of famine
C．poor irrigation system constitutes a great barrier to the agricultural development of regions of scarcity
D．the population is multiplying rapidly
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