Youlooknotabitolderthanyoudid5yearsago.Howdoyou__________soyoung?

You look not a bit older than you did 5 years ago. How do you __________so young?

Thenumberoftallbuildings__________greatlyinTianjininthelastfewyears.

John said he would pay __________ second visit to China __________ next month.

His whole school education ________ only 2 years because of his illness.