The new machine，if _________ properly，will work at least ten years.
| A．use | B．using | C．being used | D．used |
He is sometimes hard _______ us, but it hasn't made us like him any less.
| A．with |
| B．at |
| C．on |
| D．in |
I'11 never forget the days_______ I would sit in front of the house, listening to him telling stories.
| A．on which |
| B．at which |
| C．that |
| D．in which |
But nobody believed that the reason_______ I was late was _______my bicycle broke down on the way to school.
| A．why; because |
| B．why; that |
| C．that; that |
| D．that; because |
She said that she didn't mind _______ alone at home.
| A．leaving |
| B．to leave |
| C．being left |
| D．to be left |
--- Would you please help me with the Maths homework?
--- I'm afraid it's beyond me. You know, it's years _______ I touched it.
| A．before |
| B．that |
| C．after |
| D．since |