问题
If we __________ careful，fire can be dangerous。
A:don’t be
B:are
C:aren’t
D:won’t be
B:are
C:aren’t
D:won’t be
正确答案是：
同类题型
We must study hard, because we shouldn’t _______ our parents _______ .
How was Jack last night?— He was so ___________ that he fell ____________ quickly.
Don’t be discouraged. ______ things as they are and you will enjoy every day of your life.
Do you know the young man well?—Sure, we __________ friends since we met in Nanjing three years ago.