单项选择题

This kind of material can ______ heat and moisture

A．delete
B．compel
C．constrain
D．repel
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单项选择题
To our ______ Geoffrey's illness proved not to be as serious as we had feared.
A．anxiety
B．relief
C．view
D．judgment
单项选择题
Under the guidance of their teacher, the pupils are building a model boat ______ by steam:
A．towed
B．tossed
C．propelled
D．pressed
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