单项选择题

When is an appropriate time to ask questions

A.Anytime during the tour
B.Before entering the building
C.At each of the stations
D.After the tour’s completion
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单项选择题
What does the speaker ask Samantha to do
A.Put off the meeting
B.Check on the regional branches
C.Contact her when he comes back to the office
D.Meet her the next day
单项选择题
What does the speaker recommend
A.Reminding of the hazardous impact of smoking
B.Providing safety masks and safety clothing
C.Asking as many questions as possible
D.Following the safety procedures
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