【正文】
have/has been done ① (the office/clean) ② (the shirts/iron) ③ (the window/break) ④ (the roof/repair) ⑤ (the car/damage) ⑥ (the houses/knock down) ⑦ (the trees/cut down) ⑧ (they/invite/to a party) The office is being cleaned. The shirts have been ironed. The window has been broken. The roof is being repaired. The car has been damaged. The houses are being knocked down. The trees have been cut down. They have been invited to a party. When I got to the party, the party/prepare the hall/decorate the foods/serve ① The party ______________________