Using a telescope we could see that something .
| A．is happening | B．happened | C．would happen | D．was happening |
Answering questions from readers throughout the country is the major work of the author.
| A．a sort of |
| B．all sorts of |
| C．all kinds of |
| D．both B and C |
The man who lived next door to be a thief.
| A．was proved |
| B．was proving |
| C．proving |
| D．proved |
Tom used to spend a lot of time computer games, which makes him very regretful.
| A．in |
| B．with |
| C．to |
| D．on |
I don’t like the way he speaks. He always looks down on others.
| A．which |
| B．that |
| C．what |
| D．by which |
Habits are like food we eat every day, which have both positive and negative effect our lives.
| A．in |
| B．on |
| C．to |
| D．for |