连词成句。 (1)it / is / to / piano / difficult / the /play (?) _________________________________________________ (2)dinner/ I / have / 6:20 / at /pm (.) ________________________________________________ (3)practises / at / she / English / home (.) ________________________________________________ (4)the / clean /they / windows / Sundays / on(.) ________________________________________________ (5)film / does / a / see /she / on/ Monday (?) ________________________________________________