But it took about 30 years for the American people_____?_______ t_英语解答

But it took about 30 years for the American people_____?_______ them.
A：know
B：to know
C：to know about
D：know about

人气：333 ℃　时间：2020-05-19 07:35:46

解答

选C
know about sb了解某人
It takes sb some time to do sth 这里得接不定式形式