单项选择题


Questions 11-14 are based on the following dialogue:
Approximately how much metal is in orbit in space

A．17,000 pounds.
B．3,000 tons.
C．3,000 pounds.
D．300 tons.
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单项选择题
How often does the chess club meet
A．Every week.
B．Every three weeks.
C．Every few months.
D．Two times a year.
单项选择题
A．offB．downC．asideD．out
A．off
B．down
C．aside
D．out
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