As matter of fact, number of young couples who plan to have a second kid is increasing rapidly.
| A．the; a | B．a; the | C．a; a | D．不填；the |
32.So often ______ in recent years that it has almost become a rule.
| A．has this happened | B．this has happened |
| C．is this happening | D．for this to happen |
31.The farmer who admitted ______ the tiger was severely punished.
| A．to kill | B．killing | C．killed | D．to have killed |
30.They ______ be at home. You see, the door is locked from the outside.
| A．can’t | B．may | C． must | D． mustn’t |
29.Our English teacher had us all _______our names on a card.
| A．written | B．to write | C．write | D．for writing |
28.The ______ student standing at the gate speaks very good Chinese.
| A．tall young American | B．young tall American |
| C．American tall young | D．American young tall |