1 . ________ is this book?
A.Who’s | B.Whose | C.What’s | D.How do you like |
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2 . Please study hard,________ you’ll fail behind others.
A.and | B.so | C.or | D.but |
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3 . Some students think that studying grammar is not helpful _______.
A.not at all | B.at all | C.all | D.very |
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