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
Neil Armstrong is the first man .
#48796
A
walk on the moon
B
walk on moon
C
to walk on the moon
D
to walk on moon
It is difficult for the students______ the homework on weekends.
#49154
A
finish
B
to finish
C
finishing
D
finished
Her cousin plans _________ a very _________ vacation.
#50026
A
take; relaxed
B
to take; relaxed
C
to take; relaxing
D
taking; relaxing