Experts are trying to _________ ways to clean up the huge slick.
举一反三
- It is a huge task to_____all the rooms in the building in such a short time. A: go ahead with B: keep up C: clean up D: work out
- 中国大学MOOC: As I was trying to clean up the mess, the lights and we couldn’t see anything.
- As I was trying to clean up the mess, the lights and we couldn’t see anything. A: ran out B: went out C: ran up D: went up
- clean up ______
- Experts say walking is one of the best ways for a person to ____ healthy.