问题
I ________ more careful in that quiz. I made too many stupid mistakes.
A:must be
B:could have been
C:must have been
D:could be
B:could have been
C:must have been
D:could be
正确答案是：
同类题型
Some Chinese words, ____________ Tuhao and Dama, were added to some English dictionaries in 2014.
108DrManette had been mentally ____ by his long years alone in prison and his hair had turned white
They said at last that they ____ better start out at once.
ly I have bought an ipad mini on the website ofTaobao.com, _______ the price is very reasonable.