One of the ________ of our planet’s warming up is an increase in the number of natural disasters.
| A．consequences | B．reasons | C．causes | D．processes |
When he came to, he found himself _____ on a chair, with his hands _____ back.
| A．to sit; tying | B．sitting; tying |
| C．seating; tied | D．seated; tied |
- Did you get a dictionary?
- No, I _____, but there were not any _____.
| A．tried; to be left | B．had tried to; leaving |
| C．tried to; left | D．had tried; have left |
_____, the subject was always in my mind.
| A．Walking or sleeping | B．Walking or slept |
| C．Having walked or slept | D．To walk and sleep |
As I will be away for at least a year, I’d appreciate _____ from you now and then so that I can know how everyone is getting along.
| A．having heard | B．to hear |
| C．hearing | D．being heard |
The program was so exciting that the children kept their eyes _____ on the screen.
| A．to fix | B．to be fixed | C．fixed | D．fixing |