题目内容
11.I didn't catch the bus.I walk four kilometers to wait for another bus.( )| A. | was able to | B. | had to | C. | should | D. | might |
分析 我没有赶上公交车.我不得不走四公里去等另一辆公交车.
解答 答案:B.考查情态动词.句意"我没有赶上公交车.我不得不走四公里去等另一辆公交车.".A能.B不得不.C应该.D可能.结合语境可知,没赶上车,不得不步行四公里等另外一辆.用have to不得不…一般过去时态have过去式是had.答案是B.
点评 情态动词无人称和数的变化;不能单独使用,必须与其后的动词原形构成谓语.否定形式通常在后面加not.要注意情态动词的不同用法.
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