一、用括号中所给单词的适当形式填空。
1.Waste paper and bottles ________________(collect) for recycling.
2.Could you please turn down the TV? Your brother___________(review) his lessons.
3. All of us ____________ (pass) the exam. How happy we are!
4.Three patients __________________(operate) on by the famous doctor in the past 10 hours.
5.Mike missed the chair and fell down.Luckily，he was not ______(bad) hurt.
6.Everyone should ________ (have) dreams and work hard to achieve them.
7.All the students in our class took part in________(clean)up the park last Saturday.
8.There used to ________ (are) many trees around our school.
