单项选择题

According to the research by NASA, an afternoon nap ______.

A．can greatly improve the efficiency of work
B．can fall into a deep sleep and will wake up groggy
C．makes people suffer a decline in their alertness
D．is an admission of weakness

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单项选择题

Which of the following is NOT included in the Weekend Package

A．Superior room for single or double, inclusive of service rate.
B．Guests can enjoy free buffet breakfast.
C．A 20% discount on laundry and valet service at that time.
D．A 15% discount on food and beverage.

单项选择题

What are the possible relationship between the man and the woman

A．Manager and secretary.
B．Employer and employee.
C．Interviewee and interviewer.
D．Classmates.