1. Books ____________ (write) in easy English are very popular among Chinese middle school students.
2. When they met again, they were too excited ______________ (say) a word.
3. Through the window, I saw some boys _____________ (play) basketball.
4. Mr. Black gave up _____________ (smoke) only a few years ago. He looks very healthy now.
5. He was very ___________ (excite) to hear the news that their team had won.
