The flowers every day, or they’ll die.
A.can be watered B. should water C. must be watered D. water
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。
Liu Xiang ________by his coach to train regularly.
A.advised B.advises C.was advised D.be advised