If we __________ careful，fire can be dangerous。
#41667
A
don’t be
B
are
C
aren’t
D
won’t be
推荐题目
During the last 3 years, the students ________ more than 2000 English words.
#38405
A
have learned
B
learned
C
are learning
D
will learn
—Are you going anywhere?—I ______about visiting my sister, but I have changed my mind.
#36299
A
think
B
have thought
C
will think
D
thought