. ------ The door was open.
----- It ___________open. I had locked it myself and the key was in my pocket.
| A．can’t be | B．mustn’t be | C．can’t have been | D．mustn’t have been |
This event was rather unusual, ________?
| A．is it | B．isn’t it | C．was it | D．wasn’t it |
How I envy you _______ your good luck!
| A．in | B．of | C．to | D．/ |
Tom: Would you like me to water your plants while you’re on your holiday?
Joe: ________
| A．No problem. I was more than glad to do it. |
| B．I appreciate it, but I’m already finished watering them. |
| C．Thanks for offering your help, but my brother’s going to do it. |
| D．Certainly watering plants is my favorite pastime. |
The old lady devoted her lifetime _______ the homeless children.
| A．to help | B．to helping | C．helping | D．for help |
The shop owner would _______ his money every day.
| A．count | B．count for | C．count out | D．counting |