单项选择题

A．They are found under the oceans.
B．Their emissions created earth’s atmosphere.
C．They were most active when earth was first formed.
D．Their fumes are mostly water in the state nfs gas.
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单项选择题
A．8,000 people.B．80,000 people.C．10,000 people.D．100,000 people.
A．8,000 people.
B．80,000 people.
C．10,000 people.
D．100,000 people.
单项选择题
A．The rain has stopped.B．She is looking for her clothes.C．She wants to soak her clothes.D．It’s mining heavily.
A．The rain has stopped.
B．She is looking for her clothes.
C．She wants to soak her clothes.
D．It’s mining heavily.
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