问题
Obama is ____________ the first black president of the USA.
A: . known as
B:known of
C:known for
D:known to;
B:known of
C:known for
D:known to;
正确答案是：
同类题型
Before you ______ the design of this product, you need to study the market carefully. [ ]
You’d better goto bed. There isn’t anything on TV worth ________ up for.
I don’t know ______ a show. Can you tell me
Our holiday was _______. — Yes, I’ve never had __________.
the professor’s talk got____ to dowith your present researchYes, it has____ to do with my research