Please see that such an _ does not occur again.
A. mistake
B. negligence
C. oversight
D. carelessness
呼出限制的类别分为()
A. 限制全部呼出(K=1)
B. 限制呼叫国际和国内长途自动电话 (K= 2)
C. 只限制呼叫国际长途自动电话(K= 3)
D. 只限制呼叫本地电话
In case you can make a reduction _ 5% _ your price, we may strike the deal with you.
A. of, of
B. by, by
C. of, in
D. for, for
No discount will be granted _ you place an order for more than 1000 dozen.
A. if
B. unless
C. whether
D. but for