Question

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

Answer 1

【答案】B
【解析】句意：我不知道我能做什么。how can I do it作为动词know的宾语从句，应用陈述语序how I can do it，what can I do应为what I can do。故排除AC两项。do是及物动词，后面需接宾语it，故选B。