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参与奖励15沪元，各位客官如果能给出解释的话再奖励5-10沪元。禁止灌水~！

147. Evidence came up ______ specific speech sounds are recognized by babies as young as 6 months old.
A. what
B. which
C. that
D. whose

148. The traditional approach ______ with complex problem is to break them down into smaller, more easily managed problems.
A. to dealing
B. in dealing
C. dealing
D. to deal

149. Frankly speaking, I’d rather you _______ anything about it for the time being.
A. didn’t do
B. haven’t done
C. don’t do
D. have done