Mr Li has taught English in this school ________.

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A．twenty years before

B．twenty years ago

C．twenty years long

D．all his life

I know ________ is good for us to read English every day.

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Physics is more interesting than ________ subject.

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________ will your father be back home?

He said he would be back in three weeks.

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________ have you written to your pen friend? Once a month.

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________ close the window.

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The next morning she found the man ________ in bed dead.

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He has travelled ________ the world.

[　　]

“She says she feels tired again”. “But she has ________ woke up? ”

[　　]

They dressed ________ for the party.

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