You look so tired. You _________ have stayed up again.A．shouldB．canC．mayD．must
题型：不详难度：来源：
| You look so tired. You _________ have stayed up again. |
答案
| D |
解析
| “你看起来很累。你肯定又熬夜了。”should应该， can可能，可以，may可能，可以， must必须，所以答案D。 |
举一反三
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