I don't know ____________.A how to do it B what to do it C w

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I don't know ____________.A how to do it B what to do it C what I should do it D what I should do
选择．请回答都有哪个答案是正确的,为什么．其它的为什么不对?

how是“怎么”,后要加一个宾语“it”,what是“什么”,后不用加宾语.所以是AD拉!按我们老师说的,就是把它变成陈述句,比如D,变成陈述句就是I should do what,讲得通吧!而C,I should do it what,有两个宾语~

I don't know ( ).A.what to do it B.how to do it C.what to do 7.I don’t know _________.A.what to do it B.how to do it C.wh I really don't know -----with it.A .what to do B.how to do 选 I really don`t know_____ A.what to do it B.how to do C.what I don't know -----it next .A wha t to do B how to do C how c Children don't always know____.A.what to do it B.how to do i I DO not know ( ) it today A What to do B how to do C to do I don't know ______.A what to do with it B what to do it wit I don't know___.A.what to do it B.what do C.have to do it D. I don't know "What to do 和 I don't know "How to do it"?哪个句子是 I don't know _____ A.how to do B.which to do C.what do D.whe i don't know how to do it.为何要加It?而what to do 后则不加it?