I 'm running for 50 minutes
                    举一反三
- 中国大学MOOC: I’m sorry to __________ you, but I’m afraid we are running out of time.
 - The traffic was very heavy; otherwise I ______ (be) here 50 minutes sooner.
 - I’m too tired. Let’s have a few ___ rest. A: minutes B: minute’s C: minutes’
 - 【单选题】Walking briskly for thirty minutes will burn as many calories as__________. A. to run for fifteen minutes B. running for fifteen minutes C. you run for fifteen minutes D. fifteen minutes walking
 - I’m sorry to __________ you, but I’m afraid we are running out of time. A: cut B: stop C: interrupt D: prevent
 
