题目内容

Once at your destination, public transport like ______ the metro or city buses is an affordable and sustainable way.

A. take
B. taking
C. to take

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Choosing a local village inn________ a special experience for travelers.

A. may be
B. must be
C. can be

Nowadays, many areas face energy ________, such as water and oil.

A. short
B. shorten
C. shortage

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A. litter
B. littering
C. to litter

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A. can be
B. may be
C. must be