His teacher worried that the student spent too much time on the computer and not enough time _______.
| A．to study | B．study | C．studied | D．studying |
This problem is said _______ three times, but he still can’t understand it.
| A．to have been explaining | B．to have explained |
| C．having been explained | D．to have been explained |
---I heard that you made a bicycle trip to the 2010 World Expo of Shanghai alone.
---No. Actually, my friend Bob ________ me.
| A．accompanied | B．conducted |
| C．instructed | D．received |
I went the village yesterday_________ to see my uncle, who lived there for 20 years.
| A．special | B．especially | C．specially | D．especial |
The problem of the present world is that those who are imaginative have little experience_________those who are experienced have weak imagination.
| A．unless | B．although | C．because | D．while |
He ran all the way to the station only _______________ the train had already left.
| A．find | B．to find | C．finding | D．to have found |