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If you have questions,you should ask the teacher _________help.
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from
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on
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for
D
to
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That happened _______ a Monday morning．
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He often practices English        chatting with his pen pal in Australia.
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Who are you talking _________?
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Our country provided the people _____ plenty of things during the flood.
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Sorry, I don’t know the answer _______ the question_______ it is too hard.
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too, or
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to, so