Your phone number again? I( )catch it.It is 9568442.
考试:=$ecms_gr[fenlei]?>
科目:=$ecms_gr[kemu]?>(在线考试)
问题:
A:didn't
B:couldn't
C:don't
D:can't
答案:
解析:
【解析】由again可知“刚才没有记下电话号码”,指的是过去发生的事情,所以要用过去时,可排除C和D;另,B和D都用到情态动词couldn't/can't,其意是“不能”记下,强调“无此能力”,既然不能,那“again”也就没有意义了,故可进而排除B;综上,本题选A。