The math problem is very diffcult.You must ___ carefully.A.think it aboutB.think about itC.think over itD.Thank it over

问题描述:

The math problem is very diffcult.You must ___ carefully.
A.think it about
B.think about it
C.think over it
D.Thank it over

think it over 再三考虑,仔细想想
选 D