—What do you think of teacher，Bob?—I find it fun and challenging.It is a job ________ you are doing something serious but interesting.
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where
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I can think of many cases ______students obviously know a lot of English words and expressions but couldn’t write a good essay .
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why
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which
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People _______ the dead person was related would make paper-cut offerings on special days.
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for whom
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to whom
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Help is needed for families _________ homes were destroyed during the earthquake.
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