I must be getting fat—I can _______ do my trousers up

This book is really good. I’ll buy it, _________ it’s a little expensive.

Have you got a dictionary I want to____ the correctspelling of the word.

He made a promise _____ he would treat me to dinner if I helped him with his housework,______ made me very excited．

It was about 5 o’clock in the afternoon _______ they had their supper.