Make sentences , using the words given
1: Lan / must / finish/ all / homework / tonight .
2: You must not / walk / grass / park.
3:We / must / follow / all/ signs / swimming pool .
4: She / ought to / help / mother / housework.
5: Ba / can / swim/ arcoss / river.
6: Small children / can / learn / swim / quickly / easily /
7: We / ought to / clean / classroom .
8: You / should / exercise / regularly / keep / fit / healthy/
9: they / should / take part / sports activities.
10: You / must not / stay up / every night .