中国大学MOOC: He urged donors to _____their efforts to send aid to Somalia.
举一反三
- He urged donors to ( ) their efforts to send aid to Somalia.
- 【单选题】He urged donors to ________ their efforts to send aid to Somalia. A: step on B: step up C: step off D: step down
- 中国大学MOOC: He made efforts to be the top student in the class.
- How many people in Somalia need food aid A: Fifteen thousand. B: Two million. C: Five million.
- 中国大学MOOC: The best visual aid is ________.