she works hard _____ all her lessonsa.atb.aboutc.ofd.in
问题描述:
she works hard _____ all her lessons
a.at
b.about
c.of
d.in
答
A
works hard at all her lessons - 在每门课都下了功夫,很用功。
答
似乎是选at,因为一般work hard in dong sth/at sth
答
a.at
答
当然D