I searched for my wallet and it wasn't there. At first, I thought I _______ it at home. Then I remembered _______ it out to pay for the taxi.
| A．must have left；to take | B．may leave；taking |
| C．might leave； to take | D．could have left；taking |
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 |
27.Even at the narrowest of the Pacific, it is about 3,200 km ____________.
| A．widely | B．with cross | C．crossing | D．in width |