题目内容
18.- you pass me the salt?-Here you are.But you eat too much salt.( )
| A. | Could; must | B. | Could; mustn't | C. | May; mustn't | D. | May; must |
分析 -你能把盐递给我吗?-给你.但是你不能吃太多的盐.
解答 正确答案:B.could是can的过去式,表示能、可以,也可表请求.must表示一定、必须,mustn't是其否定式,表示不能、禁止.may表示可能、可以,也可表请求,一般疑问句只能和第一人称I搭配,所以先排除CD.根据答语中的转折连词but可知说话人虽然递给了盐,但是告诉他不能吃太多的盐,此处应填写mustn't,即选择B.
点评 本题考查情态动词,清楚每个词含义用法,再结合语境即可作出选择.
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