单项选择题
A.meets B.faces C.sees
He worked in this company （） several years.A.inB.sinceC...
单项选择题He worked in this company （） several years.
A.in B.since C.for
The （）of employees in this company has doubled.A.sumB.a...
单项选择题The （）of employees in this company has doubled.
A.sum B.amount C.number
The Europeans （）to stay ahead in aeroplane design.A.fai...
单项选择题The Europeans （）to stay ahead in aeroplane design.
A.failed B.missed C.lost
