With the successful launch of Tiangong-l, which was _____ breakthrough in space field,China's space dream took a step closer to _____ reality.
| A．a;/ | B．the； a | C．a; the | D．the;/ |
Mr. Smith has three children, the youngest of them music at college.
| A．studying | B．is studying |
| C．studies | D．studied |
Generally speaking, the window seat is usually the first one .
| A．to take | B．taken | C．to be taken | D．taking |
Clive moved to London, Edward to run the office in Manchester.
| A．left | B．being left |
| C．to leave | D．leaving |
Most countries of the world have records of the great natural catastrophes thatbefore.
| A．had occurred | B．have occurred |
| C．occurs | D．would occur |
Nowhere but to the dance party on Saturday evenings.
| A．she goes | B．does she go |
| C．is she going | D．she is going |