—Where on earth have they gone?
—I have no idea, but I wish I .
| A．know | B．knew | C．would know | D．would have known |
---Do you know what WWF______ ?
----Yes. That’s World Wide Fund for Nature.
| A．stand for | B．look like | C．stand | D．like |
In developed countries, farm workers _________ only a small section of the population.
| A．pick up | B．make up | C．hold up | D．keep up |
Science and technology __________ nowadays in our socialist construction.
| A．plays an important part | B．play an important part |
| C．play important parts | D．take important parts |
_____ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.
| A．To wait | B．Have waited | C．Having waited | D．To have waited |
John as well as the other children who _______ no parents _______ good care of in the village.
| A．have; is being taken | B．have; has taken |
| C．has; is taken | D．has; have been taken |