with his business, Mr.Green seldom had a talk with his family face to face.
| A．Occupying | B．Occupied | C．Being occupied | D．To be occupied |
Is this the first time you_______ Beijing?
| A．have visited | B．was visiting |
| C．visited | D．has visited |
His singing career began to ______ in the late 1990s.
| A．get off | B．take off |
| C．put off | D．set off |
Tsinghua University, ______ in 1911, is home to a great number of outstanding figures.
| A．found | B．founding |
| C．founded | D．to be founded |
__________ you know, this is the day the quake happened
| A．It | B．As | C．That | D．What |
I hate ______ when the weather becomes freezing cold because there is no heater inside.
| A．this | B．that | C．it | D．so |