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2道the little boy was so nervous that he didn't know ____

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2道

the little boy was so nervous that he didn't know ____ .A how he could do it .B  what he could do it .C how could he do it.  D what could do it

Middle school students don't know much about shopping online ______they?----______.It's very popular with teenagers.A  do;NO   B   do ;yes  C  don't ; No   D  don't ;  Yes
A.间接引语用正常语序.what的话就不能do it了.
B.反问.真实肯定否定.