12.Listening to the recording
A. It can cause severe burns.
B. It can freeze skin in a short time.
C. It can expand the gases in the body.
D. It can cause severe pains in the body.
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13.Listening to the recording
A. He was a well-known American astronaut.
B. He designed devices to protect pilots.
C. He designed the first anti-pressure aircraft.
D. He became successful for his flying skills.
While both plans were perfectly sensible, only one seemed _____ in China’s particular situation.
A. useful
B. available
C. feasible
D. desirable
The boy lay on the ground，his eyes______ and his hands __________ .
A. closing，trembling
B. closed，trembling
C. closed，trembled
D. closing，trembled
It ____ pretty late, we took our things and retired to our room.
A. was
B. being
C. turned
D. got
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