单项选择题

A．To determine whether the Earth’’s temperature is going up.
B．To study the behavior of some sea animals.
C．To measure the depths of the ocean.
D．To measure the movement of waves in the ocean.
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单项选择题
A．Buying a car costs too much.B．Driving lessons are too expensive.C．Driving is too dangerous.D．Taking the bus is more convenient.
A．Buying a car costs too much.
B．Driving lessons are too expensive.
C．Driving is too dangerous.
D．Taking the bus is more convenient.
单项选择题
A．He performed military service there.B．He went there for a sight-seeing.C．He went there to do something different.D．He was sitting there talking to Julia.
A．He performed military service there.
B．He went there for a sight-seeing.
C．He went there to do something different.
D．He was sitting there talking to Julia.
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