单项选择题

You ______be too tired-you've only been working for an hour.

[A] must not
[B] won't
[C] can't
[D] may not

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单项选择题

-Oh, it's you! I ______you. -I've just had my hair cut, and I'm wearing new glasses.

[A] didn't recognize
[B] hadn't recognized
[C] haven't recognized
[D] don't recognize

单项选择题

According to a recent US survey, children spent up to 25 hours a week ______TV.

[A] to watch
[B] watching
[C] watch
[D] watched

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