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29.Mr.Thanh couldn't enjoy the meal because of the stomachache

-The stomachahce prevented......................

30.What is your daughter's age , Mr.Lan ?

-How.....................?

31.Minh didn't go to school yesterday because of his sickness

-because Minh.....................

32.You shuoldn't eat too much meat

-you'd............

33.How heavy is the chicken?

-What.......?

34.What's the matter with you?

-(wrong)..............

35.why were you absent from class last Monday?

-why didn't ..........?

36.Liz thought no fish was more beautiful than the colorful little fish

-(the most).............

37.long is a bad swimmer

-long swims..........

38.Mrs.Oanh cooks well

-Mrs.Oanh is............

39.Ann drives dangerously

-Ann is............

40.It is not necessary for you to finish the work to day.

-you don't have........