(改寫) My physics teacher told us light _ (travel) faster than sound.

(改寫) The street is as _ (long) as that one, but it is _ (wide) than that one.

(改寫) At the beginning of the _ (twenty) century, the world's population was about 1 700 million.

(改寫) Hong Zhanhui moves China with a moving story. We must learn from _ (he).

(改寫) Do happy people make more money than unhappy _ (one)

(改寫) I don't like talk show. I think they're b_.

(改寫) You can put a lot of beautiful Christmas p_ on the Christmas tree on Christmas Eve.

(改寫) We collect waste paper or bottles for r_.

(改寫) The moon travels around the earth. It's our s_.

(改寫) When I meet with difficulties, the teacher often encourages me to work them out by m_.