72.　 It is ten years since I ______ (leave) my hometown.

71.　 Everything was ______( familiar ) with me because I was in Japan for the first time.

70.　 Do you still remember______(see) me somewhere in Beijing ?

69.　 Trees can keep water from _______ (run) away.

68.　 A knife is _____ (use) for _______(cut) things.

67.　 Keep your eyes ______(close) when you are doing eye exercises.

66. I_____________ (watch) TV when my mother _______ (come) back yesterday.