相关考题
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单项选择题
He worked in this company （） several years.
A.in
B.since
C.for -
单项选择题
The （）of employees in this company has doubled.
A.sum
B.amount
C.number -
单项选择题
The Europeans （）to stay ahead in aeroplane design.
A.failed
B.missed
C.lost
