Scientists call on us to ______ nature and become better recyclers.

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问题 Scientists call on us to ______ nature and become better recyclers.

选项 A、learn of
B、learn to
C、learn about
D、learn from

答案D

解析 learn可作及物和不及物动词,作及物动词时,可直接跟学科、the news及从句,作不及物动词时多与of/about/from等连用或跟不定式。learn of得知,获悉;learn about学习,学到,得知;learn to后跟动词原形;learn from从…中学习,从…中得到经验。本题宾语是nature(自然),故除[D]外,其余三项都不合适。
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