There are so many kinds of cameras in the shop. We can"t decide .

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There are so many kinds of cameras in the shop. We can"t decide          .          [     ]
A. how to buy it
B. how to buy
C. which to buy

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举一反三

—Do you know      _    I can pass the exam?
—Sorry, I"ve no idea.          [     ]
A. that
B. whether
C. what

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Could you tell me     __     ?             [     ]
A.  when did it happen
B.  when it happened
C.  when was it happen

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I didn"t know  __     I should do.               [     ]
A. what
B. how
C. when

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—We can play the guitar.
—Good! Would you please show me _______ it?       [     ]
A. what to play
B. how to play
C. when to play
D. where to play

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Ads can tell you           stores are having sales and help you save money.              [     ]
A. how
B. where
C. when

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