题目内容
(2011·全国卷Ⅰ)They ________have arrived at lunchtime but their flight was delayed.
| A.will | B.can |
| C.must | D.should |
D
选D 考查情态动词。 句意: 他们本应该在午饭时间到达,但是他们的航班推迟了。 should have done表示“本应该做某事(实际却未做)”,符合句意。
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