单项选择题

According to the passage, what is one major component of Jupiter

A．Hydrogen cyanide.
B．Methyl cyanide.
C．Hydrogen.
D．Ammonia.
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单项选择题
The writer seems to think that the teacher's judgement on that sensitive piece of writing is
A．unfair.
B．reasonable.
C．foolish.
D．careless.
单项选择题
Teachers encourage the use of dictionaries so that
A．students will be able to express their ideas more freely.
B．students will have more confidence in writing.
C．teachers will have less trouble in correcting mistakes.
D．students will learn to be independent of teachers.
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