—The hall___ for international conferences is of great importance
—I see, and we are sure to complete it on time
| A．built | B．to be built |
| C．having been built | D．building |
When I talked with my grandma on the phone, she sounded weak, but by the time we ____ up, he voice had been full of life．
| A．were hanging | B．had hung | C．hung | D．would hang |
The tomato juice left brown ____ on the front f my jacket．
| A．spots | B．points | C．tracks | D．traces |
—Have you seen Rose recently?
— No．It’s five years _____ I met her．
| A．since | B．after | C．when | D．before |
The single most important factor ____ contributes to success is _____ you do every single day．
| A．that; that | B．which; what | C．which; what | D．that; what |
Most of the professors _____ to our school were from South Africa．
| A．invited | B．to be invited | C．being invited | D．had been invited |