i lost my bike,and i really don't know _____.A what should i do B what to do C how shall i do

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i lost my bike,and i really don't know _____.A what should i do B what to do C how shall i do
i lost my bike,and i really don't know _____.A what should i do B what to do C how shall i do

i lost my bike,and i really don't know _____.A what should i do B what to do C how shall i do
选择B
what与do连用 how与deal连用 故排除C
I don't know ...是主谓宾结构 know为谓语 后接宾语 应该是名词 what.其后的to do是what的后置定语(to+不定式做后置定语)

C
整句话意思是我丢了我的单车,我真不知道我该怎么做

选A

B what to do