He told us an interesting story about himself, ____why he didn’t succeed that time.
A. explain B. to explain C. explained D. explaining
He told us an interesting story about himself, ____why he didn’t succeed that time.
A. explain B. to explain C. explained D. explaining
D
很多考生会认为此处应用不定式结构表示目的，从而误选B。其实，考生没有注意到前后两部分间的逗号，逗号后面部分表示一种伴随状况。