1 . Some student representatives took turns________ (deliver) speeches at the coming­of­age ceremony.(所给词的适当形式填空)

2 . My teacher convinced me ________(take) up the challenge and decide to participate in the writing competition.(所给词的适当形式填空)

3 . We will discuss the problem in ________ to ________our understanding so that we can understand it ________.(depth) (所给词的适当形式填空)

4 . Parents arrange everything for their children and spare no effort ________ (pave) the way for their success. (所给词的适当形式填空)

5 . When I wrote a letter to Father Christmas telling him about the presents I wanted, Granny made an effort ________ (help) me. (所给词的适当形式填空)

6 . London was a new world to me and I was dying ________ (find) out more about it for myself. (所给词的适当形式填空)

7 . Public service campaigns have tried a wide range of methods to persuade people ________ (put) down their phones when they are behind the wheel. (所给词的适当形式填空)

8 . The purpose of this race was to inspire us students ________ (pay) more attention to physical exercise. (所给词的适当形式填空)

9 . I am content ________ (live) in the country, where the air is fresh and clean. (所给词的适当形式填空)

10 . The bus was due ________ (arrive) at 5: 00 p. m., but it arrived one hour late due to   ________ (hold) up by the heavy fog. (所给词的适当形式填空)