1 . Only by r________ (修改) our articles according to the teachers’ advice can we improve our writing skill. (根据中英文提示填空)

2 . Read the journal of an MSF doctor and find out what problem he was involved in t________ (处理). (根据中英文提示填空)

3 . Try s________ (伸展；拉伸) your legs and pulling your toes upwards. (根据中英文提示填空）