33.What are you doing (　　　 )vacation?

32.We can’t decide (　　　 )the date when we will go to USA.

31.He likes going to school (　　　 )foot.

31.Doing sports is good (　　　　 )our health.

30.We should keep (　　　 )good health by doing morning exercises.

29.I like hot tea (　　　 )honey.

28.The concert begins (　　　 ) a pop song and ends (　　　　 ) a western music.

27.He is better (　　　　 )swimming (　　　　 )skating.

26.We are twins.and we have much (　　　　 )common.

25. (　　　 )the moment,we are all happy to see our astronauts come back to the earth safely.