TheboyworkshardMaths,butheisn'tgoodit.A.at,onB.at,atC.on,atD.on,on

Question

The boy works hard ____ Maths,but he isn't good _____ it. A.at,on B.at,at C.on,at D.on,on

Answer 1

B
work hard at +学科 努力学习...
be good at 擅长于