36.He caught a woman’s bag and ran (　　　 ).

35.He knocked (　　　 ) a car when he crossed the road.

34.(　　　 )the 21^st Century, China will be a developed country.

33. When he ran (　　　 ) ( 　　　)money,he asked his mother (　　 )more.

32.The bell goes (　 　　　).Let’s go into the classroom.

31.(　　　 ) the time he returned, I had finished my work on the farm.

30.He fell (　　　 )the bike and broke his legs.

29.The temperature is (　　　 )zero degree in Hangzhou in winter.

28.The house was used (　　　 )a classroom in summer.

27.His mother was ill,and the doctor was operating (　　　 )her.