1.Young people_______obey their parents
a.must. b.may. c. will. d.ought to2.You _____to write them today
a.should. b.must. c.had. d.ought3.Remember, you’re in library, you ____speak loudly
a.don’t have to. b.mustn’t. c.ought must d.must4.He_____speak Chinese fluently
a.can. b.mustn’t. c.ought not to. d.shoudn’t5 She has plenty of time,so she___hurry
a. doesn’t have to. b. don’t have to. c.has to d. have to1.Young people_______obey their parents
a.must. b.may. c. will. d.ought to2.You _____to write them today
a.should. b.must. c.had. d.ought3.Remember, you’re in library, you ____speak loudly
a.don’t have to. b.mustn’t. c.ought must d.must4.He_____speak Chinese fluently
a.can. b.mustn’t. c.ought not to. d.shoudn’t5 She has plenty of time,so she___hurry
a. doesn’t have to. b. don’t have to. c.has to d. have to