You can’t imagine what great trouble they have _____ the problem _____.
| A．to solve; being talked about | B．solving; discussing |
| C．to solve; to talk about | D．solving; being discussed |
I don't feel like _____ tonight as I'm so tired．
| A．to read | B．I was going to read | C．reading | D．read |
—Good morning，Bill． —Did you have any trouble _____ through the snow？
| A．driving | B．to drive | C．drive | D．drove |
We hoped _____ being there would make the work easier．
| A．he | B．they | C．his | D．himself |
—What are you going to do this afternoon？ —I'm thinking of _____ to visit my aunt．
| A．go | B．going | C．to go | D．to going |
The boy is only five years old，but he is quite used _____ the telephone．
| A．to answer | B．to answering | C．of answering | D．by answering |