. I ____ to the top of the tree, but I fell off it and hurt my leg.
| A．must have climbed | B．was able to climb |
| C．could have climbed | D．should have climbed |
---I’m sorry I broke the vase．
---0h．______．It wasn’t very expensive．
| A．you’d better not | B．I’m afraid not |
| C．as you wish | D．that’s all right |
Take your time—it’s just ______ short distance from here to ___ restaurant．
| A．不填；the | B．a；the | C．the；a | D．不填；a |
animal
| A．achieve | B．anything | C．advance | D．anxious |
center
| A．ocean | B．decide | C．cause | D．socialist |
ground
| A．house | B．country | C．group | D．cough |