单项选择题

We would like to remind our clients that, should they have any problems ______ our products, our after-sales hotline service is available 24 hours a day.

A. to
B. at
C. for
D. with
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单项选择题
Allways Engineering has guaranteed that ______ one of its employees will lose his or her job as a result of the merger.
A. no
B. not
C. none
D. any
单项选择题
Supervisors are reminded to ______ all subordinates with consideration and to remember that any discourtesy will be viewed as a serious breach of company guidelines.
A. give
B. treat
C. leave
D. mention
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