As students, we are supposed to spend more time _________ . 
#40373
A
study
B
studied
C
studying
D
to study
推荐题目
The meeting _________ by the time I got there yesterday.
#40511
A
was on
B
has been on
C
had begun
D
has begun
—When _______ this stone bridge______ ?—In 1935.
#40011
A
did; build
B
was; built
C
does; build
D
is; built
 I__________ Lucy at the bank the other day.
#40180
A
see
B
saw
C
was seen
D
seeing