-- ________ I tell John about it?

-- No, you needn't. I've told him already.

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-- Isn't that Ann's husband over there?

-- No, it ________ be him-- I'm sure he doesn't wear glasses.

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You ________ be tired-- you've only been working for an hour.

[　　]

I often see lights in that empty house. Do you think I ________ report it to the police?

[　　]

I ______ pay Tracy a visit, but I am not sure whether I will have time this Sunday.

[　　]

-- Are you coming to Jeff's party?

-- I'm not sure. I ________ go to the concert instead.

[　　]

In competition, only women perform on the high-and-low bars, ________ is higher than the other.

[　　]

He paid the boy $10 for washing ten electric fans, most of ________ hadn't been cleaned for at least half a year.

[　　]

Can you tell me the way ________ you learn English?

[　　]

His parents wouldn't let him marry anyone ________ family was poor.

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