单项选择题
A．With B．off C．of D．on
21（）A．HoweverB．ButC．OtherwiseD．Therefore
单项选择题21（）
A．However B．But C．Otherwise D．Therefore
--Will you take these to your room and （） them safe--I'...
单项选择题--Will you take these to your room and （） them safe--I'll come and take them soon.
A. set B. consider C. keep D. get
A big dog ran in front of my mother's car and she（） sto...
单项选择题A big dog ran in front of my mother's car and she（） stop very quickly.
A. ought to B. had better C. must D. had to
