I visited Mr. Johnson during his stay in Shanghai he attended a most important conference there.
| A．when | B．which | C．where | D．in which |
After supper she would sit down by the fire, sometimes _____ an hour, thinking of her young and happy days.
| A．as soon as | B．as much as | C．as many as | D．as long as |
People were not allowed to enter the reading room because it _______.
| A．had been painted | B．was being painted |
| C．was painting | D．painted |
．_____ alone in the large house, the little boy had to learn to survive by himself.
| A．To leave | B．Leaving | C．Left | D．Being left |
Chengdu is a city _______ you hate to say goodbye once you have visited it.
| A．in which | B．at which | C．to which | D．with which |
— Did you see a man in black pass by just now?
— No, sir. I _______ a newspaper.
| A．read | B．was reading | C．would read | D．was reading |