单项选择题

A．Acquire information from satellites more efficiently.
B．To realize full coverage of area the satellite passes over.
C．Building more ground observation centers.
D．Compare satellites information with those from ground.
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单项选择题
A．They should call the fire department.B．The man should go to the party again.C．The man should contact the newspaper.D．The man should seek counseling.
A．They should call the fire department.
B．The man should go to the party again.
C．The man should contact the newspaper.
D．The man should seek counseling.
单项选择题
A．Because she didn’t find suitable courses.B．because the summer courses of this year were the same as beore.C．Because her friends persuaded her to do so.D．Because she wants to do some different things.
A．Because she didn’t find suitable courses.
B．because the summer courses of this year were the same as beore.
C．Because her friends persuaded her to do so.
D．Because she wants to do some different things.
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