---- What are you going to do this weekend ? ---- I'm going to do some outdoor activities _______ it rains .A. If B. unless C. because
What a great time they have ________ with each other during lunchtime!
Would you ______ this picture ______the wall?
Here comes the train.Let’s _________ .
There ____________ too much homework for us to do today .
What_________useful book it is! Yeah,it is wonderful and it tells you how exciting it is to travel in______sky..