下列字母书写格式正确的是 ________。A. B. C.
Our Earth will be ________ if we go on cutting down millions of trees every year.
Trees provide food and shelter and make us ______ comfortable.
Trees make our city more beautiful and ________ noisy, do you think so?
Three trees can do the job of 15air-conditioners _________ almost all day.
He gave me clothes _____ food.
B.
C.
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