单项选择题

We were able to （）the error and have credited your account.

A.track out
B.track down
C.track over
D.track up

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单项选择题

The bidders shall furnish a performance bond （）than 2%of the total bid price.

A.not lest
B.no more
C.not much
D.no less

单项选择题

We’re looking forward to（）service to you.

A.being of
B.be of
C.offer
D.have