题目内容
13.-Mum,_____ we wait until the light turns green?-Yes,we ______.That's the traffic rule.( )
| A. | need,can | B. | shall,must | C. | must,have to | D. | can,need |
分析 --妈妈,我们必须等绿灯亮了才能走吗?
--是的,我们必须那样.那是交通规则.
解答 答案:C.根据That's the traffic rule,可知我们必须等绿灯亮了才能走,这是明令规定的.所以上面的问句应该用must引导,而答语也应该用表示这种意思的短语.have to必须,不得不,指受客观条件的限制.故选C.
点评 本题考查了情态动词的用法.熟知句意以及所给选项的意思是解答本题的关键.
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