-Jack fell off the ladder yesterday, but he is all right now.-What a lucky dog! He _________ himself badly.
32.So often ______ in recent years that it has almost become a rule.
31.The farmer who admitted ______ the tiger was severely punished.
30.They ______ be at home. You see, the door is locked from the outside.
29.Our English teacher had us all _______our names on a card.
28.The ______ student standing at the gate speaks very good Chinese.