If people don’t like ____ by titles, you can ask them how they prefer to be addressed. (2018-12)
A. are called
B. being called
C. be called
D. called
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The training course ______ to introduce you to the security check at the Airport. (2019-06)
A. designs
B. be designed
C. designed
D. is designed
It has been quite some time since we _______ you at your office in Beijing. (2019-06)
A. visit
B. visited
C. have visited
D. had visited
Our clients (surprise)_____________ by the level of support we can offer in such an efficient way. (2016-12)
When they entered the area, the visitors (require)_____________to turn off their smart phones. (2017-12)