although the driver was badly hurt,he____exlpain what had happened.
问题描述：
although the driver was badly hurt,he____exlpain what had happened.
A wasable toB.could
I'm sorry,Mrs.Smith.I've broken your glasses.
It doesn't matter,Mark,but you____careful.
A.must be B.should have been
答
although the driver was badly hurt,he____exlpain what had happened.A wasable to B.could 选Awas able to 表示过去“能做”并且“做到了”could仅表示过去“能做”根据上下文,在本句中显然是强调“能并且做到了...