We work together to achieve our common purpose: __________ world that is safer, cleaner and healthier than __________ one we are living in.

Luckily, the people there did ______ help him.

Tom looks discouraged.____—It’s hard to tell what has happened.

How do you like Beijing, Miss Read—I’ve no idea. I _____ there.

Frank, with his two sisters , ______London by train which ______at 8:30 tomorrow morning .[ ]