2012高一英语:unit 4 earthquakes同步单元复习测试 新人教版必修1 i. 单项选择 when he learned that his brother had returned from abroad, he set off to his home _____. which of the following is not ok? a. immediately b. right away c. right then d. right now e. at once 2. with income going down and prices ______, it is very hard to make a living nowadays. a. rising up b. rising c. rise d. rise up 3. you could hear water pipes cracking _____ they _____ because of the cold. a. when; burst b. before; were burst c. when; were burst d. before; burst 4. you can h