.Your son has kept _________ for two hours. You’d better ask him to have a rest.
#51260
A
study
B
studied
C
to study
D
studying
推荐题目
–What time were you supposed _______?–At six o’clock. But I arrived at six thirty.
#50458
A
arrive
B
arrived
C
arriving
D
to arrive
He thinks _____ history about Chinese is very important.
#49013
A
studied
B
studying
C
studies
D
study
