The students handed in their test papers to their teacher ______.
| A．one after one |
| B．one after another |
| C．1ittle by little |
| D．step by step |
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 that before.
| 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 |
Although this sound like a simple process, great care is needed.
| A．need | B．would | C．should | D．may |