题目内容
【题目】Qian Xuesen was in charge of (developed/ developing) China's missile and rockets.
【答案】developing
【解析】句意：钱学森负责发展中国的导弹和火箭。in charge of负责；掌管，of是介词，后跟动名词，所以答案是developing。
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题目内容
【题目】Qian Xuesen was in charge of (developed/ developing) China's missile and rockets.
【答案】developing
【解析】句意：钱学森负责发展中国的导弹和火箭。in charge of负责；掌管，of是介词，后跟动名词，所以答案是developing。