at the narrowestof the Pacific, it is about 3,200 km ____________.

Bob isn’t feeling very well He hascaught a cold —Everybody seems to have ________ becauseof the sudden change of the weather

The teacher told us that everyone has an importantrole ________in protecting the earth from________.

Each time tourists travel toBeijing, they_______ the Forbidden City.

I once lived in a house _______ roof hasfallen in.