单项选择题

What steps could be taken to improve the air

A．Reduce the amount of nitrogen.
B．Increase the release of oxygen.
C．Reduce nitrous oxide emissions.
D．Stop industrial activities.
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单项选择题
A．relaxedB．frustratedC．amusedD．exhausted
A．relaxed
B．frustrated
C．amused
D．exhausted
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What can be inferred about the woman
A．She’’ll be travelling during the vacation.
B．She’’ll be working during the vacation.
C．She’’s looking forward to going home.
D．She will offer her help to Jane.
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