超星 - unit 4 online homework - 查题吧

单选题

The reduction in energy consumption can be _____ in a few ways

A. reached
B. achieve
C. achieved
D. reach

单选题

Carbon _____ in a low-carbon challenge.

A. emissions
B. emit
C. emission
D. emitted

单选题

汽油（选美国英语翻译）

A. oil
B. diesel
C. petrol
D. gas

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