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 hardly imagine the once clear canal _____ so seriously polluted that no fish can live in it. a. have become b. having become c. to have become d. to become 5. there on the shore you can see a steam powered ship covered with dirt _____, waiting to be taken
