阅读短文，用合适的单词完成下列短文。

                                                   A Foreign Teacher

     Mr. Brown is from New York (纽约) of America. He teaches English in our school. He wears a

white shirt and black trousers every day. He speaks English very well. He can speak some Chinese,

but not too much. He likes teaching in China very much. He often says the Chinese are very friendly.

We like his lessons very much. He is our good friend.

     Mr. Brown is an ______ (1). He is a ______ (2) of English in our school. He is ______ (3) a white

shirt and black trousers every day. He speaks very ______ (4) English. He can speak some Chinese,

______ (5), but ______ (6) ______ (7) ______ (8). He often says the Chinese ______ (9) are very

friendly. We all like him and his ______ (10).

机动车行驶中遇有雪天气，能见度在50米以内时的，最高行驶速度不得超过每小时（）公里。

A.20

B.30

C.40

D.51