题目

The flowers      every day, or they’ll die. A.can be watered    B. should water    C. must be watered    D. water 答案：C 【解析】 试题分析：句意：这些花必须每天都浇水，不然会死去。句子要用被动语态，其结构为be+动词过去分词；如果前面有情态动词，be用原形；情态动词can能够；must必须；结合语境故选C。 Along the way children ______ in long wool coats stopped ________ at us. A．dressing; to look B．dressed; looking C．dressed; to look D．dressing; looking