You shouldn’t accept a gift from a person ____

You shouldn’t accept a gift from a person _____ you don’t know him.

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until

unless

whether

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There is no student _______ wants to go to university.

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that

who

whoever

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Try ___ she might, Sue couldn’t get the door open.

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______ the Internet is of great help, I don’t think it’s a good idea to spend too much time on it.

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Henry, take this seat, ________ you’ll have to stand watching the game.

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