As students, we are supposed to spend more time _________ . 
#40373
A
study
B
studied
C
studying
D
to study
推荐题目
Many accidents _________ by careless drivers last year .
#39725
A
are caused
B
were caused
C
have caused
D
will cause
--- How long have they ______ France?  --- For about half a year.
#42173
A
been to
B
gone to
C
gone in
D
been in