The Math problem is too difficult we really don’t know to do it .A. whichB. whereC. wha

问题补充：

The Math problem is too difficult , we really don’t know to do it .

A. which

B. where

C. what

D. how

答案：

A. which

B. where

C. what

(答案→)D. how

解析：句意：这道数学题太难了，我们真的不知道怎么做。A. which哪一个； B. where 哪里；C. what 什么；D. how怎样，根据句意，故选择D。