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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What caused the problem
A.A bad weather
B.A defective product
C.A delivery charge
D.A supply shortage
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Where does Samantha probably work
A.In the accounting department
B.In the sales department
C.In the marketing department
D.In a regional office
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