I think English is as important as math.So we should work hard ( _英语解答

I think English is as important as math.So we should work hard ( ) English.
A.on
B.at
C.in
D.for

人气：349 ℃　时间：2019-10-24 13:29:21

解答

B.at
work hard at
基本翻译
努力工作（学习）
网络释义
work hard at:努力做 | 努力工作 | 努力学习