---Who is the tallest boy? ---It ______ be John. John is of medium heigh
题型：不详难度：来源：
---Who is the tallest boy? ---It ______ be John. John is of medium height.| A．must | B．needn’t | C．might | D．can’t |
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答案
| D |
解析
| John is of medium height.约翰是中等高度。从这句话来看，前面应为否定句。只有D选项can’t(不能)符合题意。 |
举一反三
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