I can't decide _____.A.when to do it B.when to do C.when I should do D.how should I do it

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I can't decide _____.A.when to do it B.when to do C.when I should do D.how should I do it
I can't decide _____.A.when to do it B.when to do C.when I should do D.how should I do it

I can't decide _____.A.when to do it B.when to do C.when I should do D.how should I do it
A.“动词+特殊疑问词+不定式”的结构,又因为do是及物动词,所以它的后面必须接宾语
“我不能下决心什么时候做这件事”
不选D是因为它的语序不对,应该用陈述语序how I should do it,这样就可以了

D

选A, C 后应该加it,

A.when to do it