unit 5 单元过关 b卷 ⅰ. 单项填空（共20小题；每小题1分，满分20分） 1. — it’s getting late. i'm afraid i must be going now. —ok. _________ .. a. take it easy b. go slowly c. stay longer d. see you 2. the journey around the world took the old sailor nine months, __ __ the sailing time was 226 days.
