单项选择题

(The atmosphere) (is consisted) of certain gases (mixed together) (in) definite proportions.

A．The atmosphere
B．is consisted
C．mixed together
D．in
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单项选择题
Having (finished) his term paper (before the deadline), (it was delivered) to the professor (before) the class.
A．finished
B．before the deadline
C．it was delivered
D．before
单项选择题
He is opposed (to) the project (for the reason) why it is not (feasible) (for the time being).
A．to
B．for the reason
C．feasible
D．for the time being
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