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

I knocked on the door several times but         answered, so I left.

下面哪一组字母的顺序是正确的。

I have more paper clips than____    ___, but my CDs are fewer than_____  ___.

-Is this your pencil? -Yes, it's  _. Look, here is No. 5.