the two boys are both good ( ) math,but weak ( ) Chinese.A.at;at B.in;in C.at;in D.in;at

问题描述:

the two boys are both good ( ) math,but weak ( ) Chinese.A.at;at B.in;in C.at;in D.in;at

选C
at ,be good at 擅长...
in ,be weak in 在...差