Ⅰ. 用所给词的适当形式填空(3分钟，10分)
1. Before class, Mr. Liu asks us to keep _____ (read) English for five minutes.
2. His mother likes _____ (cook) and she is a good _____ (cook).
3. The motorbike _____ (cost) him 4, 000 yuan.
4. It’s not easy for me _____ (ask)him for help.
5. To _____ (they) surprise, they found their lost dog.
