Nobody but us _____ the secret.
| A．know | B．knows | C．have known | D．is known |
The old man has retired from the factory. He _____ there for 30 years.
| A．works | B．worked |
| C．has worked | D．was working |
Generally, _____ to a university in western countries, international students need to prove their ability to speak English.
| A．admitting | B．admitted |
| C．being admitted | D．to be admitted |
Try to eat food groups _ _ vitamins A, C and E—they will do lots of good to your eyesight.
| A．containing | B．contained |
| C．to contain | D．to be contained |
The discovery of new evidence led to ______.
| A．the thief having caught | B．catch the thief |
| C．the thief being caught | D．the thief to be caught |
The lawyer said he had handled many cases where somebody _____ of a crime turned out to be innocent.
| A．charged | B．arrested | C．sentenced | D．accused |