5.　　　 Don’t smoke here, __________?

4.　　　 There is little water in the bottle, __________?

3.　　　 Nobody can answer this question, ________?

2.　　　 This is American country music, ______?

1.　　　 You are not going out today, _______?

112. When she was a little girl, she _________(live) in a small village.

111.The children __________ (plant) trees on the hill at this time last year.

110.While I _________ (watch) TV, my mother ______ (cook) yesterday.

109. I ___________ (read) a book when my father came home yesterday.

3、若自然数n有m个正奇约数(包括约数1)，求证：n有m–1种拆成连续自然数之和的方法。