He is good at English, ______we all know.

We will be shown around the city: schools, museums, and some other places, _______ other visitors seldom go.

The school sports meet, originally to be held last Sunday, was finally _________ because of the bad weather.

Something is wrong with the window; it _______ not open.

You should ________ some plans to improve your spoken English.—OK, I will try.