单项选择题

Questions 9 to 12 are based on the conversation you have just heard.

A. It hasn’t been fully tested.
B. It’s quite expensive.
C. It uses up scarce minerals.
D. The gas it produces is harmful to the environment.
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单项选择题
A. He is not a very formal person. B. He is a busy person.C. He is not a very active person. D. He is a very strict person.
A. He is not a very formal person.
B. He is a busy person.
C. He is not a very active person.
D. He is a very strict person.
单项选择题
A. Picture language preceded oral language. B. Oral language preceded picture language. C. They developed side by side. D. Picture language is more important than oral language.
A. Picture language preceded oral language.
B. Oral language preceded picture language.
C. They developed side by side.
D. Picture language is more important than oral language.
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