We should study the new traffic rules and 1earn how___________ ourselves．
#49689
A
protect
B
to protect
C
protecting
D
protected
推荐题目
—When __________ he __________ fishing?—Next weekend.
#49641
A
was; going
B
is; going
C
does; go
D
did; go
The retired couple enjoy__________ photos．They always go out with their cameras．
#49265
A
take
B
took
C
to take
D
taking
I often see my mother __________ chess with my father after supper.
#48889
A
to play
B
played
C
play
D
playing