The theory he had stuck ______ to be true.
| A．proved |
| B．to proving |
| C．to prove |
| D．to proved |
Great efforts to increase grain production if food shortages are to be avoided.
| A．could be made | B．must be made |
| C．might be made | D．would be made |
I will never forget my teacher’s advice: “As long as you can affect life of your child in an active way, you’ve been success.”
| A．/ ; the | B．a; / | C．a; the | D．the; a |
--- Don’t forget to take the message to my teacher.
--- .
| A．Yes, I will. | B．No, I won’t. |
| C．I don’t think so | D．Sorry, I don’t |
After a knock at the door, the children heard his mother’s voice him．
| A．calling | B．called | C．being called | D．to call |
Not until the train pulled into the next station ______ that his briefcase had gone.
| A．did Tom find | B．Tom did found | C．Tom had found | D．Tom found |