3．The price has gone up ________ 30%.

　　解析：by 表示程度。

　　答案：by

　　4．In the last ten years, the number of people who lost their lives ________ (go) up.

　　解析：the number of...作主语，谓语动词用单数；in the last ten years 与现在完成时连用。

　　答案：has gone

　　5．He got ________ (stick) in the traffic jam, so he was late for work.

　　解析：get stuck in 被困在......。

　　答案：stuck

　　6．________ average, two accidents happened a month.

　　解析：on average 按平均计算。

　　答案：On

　　7．He was ________ (addict) to driving his car.

　　解析：be addicted to 沉溺于......。

　　答案：addicted

　　8．________ (occupy) in doing her homework, she didn't notice me standing by.

　　解析：occupied in doing sth. 忙于做某事，在句中作状语。

　　答案：Occupied

　　9．The beauty of nature is ________ (attract)．

　　解析：形容词作表语。

　　答案：attractive

10．He picked ________ his wife after work.