I really a difficult problem.I don't know what __ next

I really a difficult problem.I don't know what __ next
A:how I should do
B.how to do
C.what I should do it
D.what to do
注：请说明理由.

你家的蜗牛 1年前已收到3个回答举报

草根雕龙春芽

共回答了18个问题采纳率：100% 举报

D
原句中多了what
注：HOW 是副词,不能用宾语,故 A B 最后要加it , C 要省去it

1年前追问

你家的蜗牛举报

只要是how`````,都要加it吗？

举报草根雕龙

这道题是要中it ，但其它的不一定是it哦，要根据句子的意思，反正就是动词后要有宾语

mountaishan 幼苗

共回答了33个问题举报

选择D。
what引导的是know的宾语从句。
如果选择C的话，应该去掉it。
因为句子里有了what，再选择how就不合适了。

1年前

w18450236 花朵

共回答了2196个问题举报

选 D what to do
因为do是及物动词，后面要加宾语what 也就是干什么,也可以说 what I should do
而how 是怎么样的意思。不能说“做怎么”，只能是“怎么做它”，因此用how，必须是 how to do it 或How I shlould do it

1年前

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