— I don't know ________ this math proble
题型:选择题
问题:
— I don't know ________ this math problem. It's too hard.
— You can ask Mr. Liu for help. [ ]
A. how to work out
B. when to draw up
C. how to give up
— I don't know ________ this math problem. It's too hard.
— You can ask Mr. Liu for help. [ ]
A. how to work out
B. when to draw up
C. how to give up