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Some economists predict that the dollar will remain weak _____ economies abroad are expected to grow
faster than that of the United States.

A. while
B. as
C. before
D. until
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科目：高中英語 來源：浙江省模擬題 題型：單選題

Some economists predict that the dollar will remain weak _____ economies abroad are expected to grow
faster than that of the United States.
[     ]
A. while
B. as
C. before
D. until

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