单项选择题

What is the national average rate of the measles among children

A．13 out of every 1000 children.
B．40 out of every 1000 children.
C．1 out of every 1000 children.
D．0.3 out of every 1000 children.
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What’s one of the main advantages of Flexible time for workrs
A．Have a greater sense of duty.
B．Get higher pay.
C．Avoid working hard.
D．Avoid busy traffic.
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What course is the man taking
A．Astronomy.
B．Psychology.
C．Physical therapy.
D．Job counseling.
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