2. ______, not having studied the lab manual carefully.
(A)The experiment was a failure
(B)Since the experiment failed
(C) They failed the experiment
(D)Since they failed the experiment

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統計： A(6), B(22), C(37), D(13), E(0) #2059621

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#3564007
They failed the expe...
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#3682575
They failed the expe...
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