18 Put the verbs in brackets into the correct form and read the joke. A man... (to buy) a parrot which could already talk. However, the man soon.... (to discover) that the parrot mostly... (to know) bad words. At first he... (to think) it... (to be) funny, but then it... (to become) tiresome, and finally, when the man... (to have) important guests, the bird's bad words... (to embarrass) him very much. As soon as the guests (to leave), the man angrily ... (to shout) at the parrot, That language must stop! But the bird... (to continue) telling bad words. Now the man... (to be) really angry. He... (to grab) the parrot and ... (to put) it into the refrigerator. But it (to have) no effect. From inside the refrigerator, the parrot still... (to say) nasty words. Then the man ... (to open) the door of the freezer, (to throw) the bird into it, and (to close) the door. This time there... (to be) silence. After two minutes, the man... (to open) the door and ... (to remove) the very cold parrot. Slowly the shivering parrot... (to walk) up the man's arm, (to sit) on his shoulder and... (to speak) into his ear, sounding very frightened, I'll be good, promise... Those chickens in there... what... they... (to say)? 102​