【題目】I don't know ________.
A.how can I do it
B.how to do it
C.what can I do
D.how to do

【答案】B
【解析】句意：我不知道我能做什么。how can I do it作為動(dòng)詞know的賓語(yǔ)從句，應(yīng)用陳述語(yǔ)序how I can do it，what can I do應(yīng)為what I can do。故排除AC兩項(xiàng)。do是及物動(dòng)詞，后面需接賓語(yǔ)it，故選B。

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