I saved your life and it's unfair that you want to kill me ______.
| A．in return |
| B．in turn |
| C．by turns |
| D．by return |
The TV play was so fascinating that the children kept their eyes __________ on the screen.
| A．to fix | B．fixing | C．fixed | D．being fixed |
With nothing __________ to burn, the fire became weak and finally died out.
| A．leaving | B．left | C．leave | D．to leave |
He is very popular among his students as he always tries to make them __________ in his lectures.
| A．interested | B．interesting | C．interest | D．to interest |
All the members were __________ the proposal.
| A．in need of | B．in place of |
| C．in agreement with | D．in exchange for |
Professor Jordon is well known for his __________ into the habits of the common housefly.
| A．examination | B．introduction |
| C．research | D．expression |