The math problem is so difficult,I don't know __ A how to do Bwhat to do Cwhat to do it Dhow to doit

问题描述:

The math problem is so difficult,I don't know __ A how to do Bwhat to do Cwhat to do it Dhow to doit

选D how to do it
翻译:这道数学题太难了,我不知道如何解题。

选 b 因为这个句子有两个回答,what to do 或者 how to
do it 区别就在于what可以做to do的主语,how不可做主语,后面应该加it how
只是强调怎样做,方式状语

D

答案选Dhow to do it
这道数学题太难了,我不知道要怎么解决它 。

how to do it

B

Dhow to do it
这个数学问题很难,我不知道怎么去做它.
祝进步

根本