The trip from Kitty’s school to the park _________ about one hour by taxi.

We must try our best to stop the pollutiona happier life.

I oftenthe words I don’ t know in the dictionary or on the Internet.

Whose is this blue sweater?—It ___ be Hong Tao’s. His is white.

If you don’t work _______ enough, I don’t think your dream will come_______.