—Which one do you want to buy, an iPod touch 4, an iPad 3 or an iPhone 5?—______. They are too expensive.

—Would you like        cup of coffee?—No, thanks. I’ve had enough.

The man called his professor for help because he couldn’t solve the problem by _________.

—There are so many flowers on ___________ side of the street．—Yes．I hope that all the flowers belong to _______________．

The teacher asked the boy many questions, but he only answered ______ of them.