She was afraid __________ the dog in case it became dangerous.
| A．of exciting | B．to excite |
| C．that she excited | D．to be exciting |
The incomes of skilled workers went up. __________，unskilled workers saw their earnings fall.
| A．Moreover | B．Therefore |
| C．Meanwhile | D．Otherwise |
________ all of them are strong candidates, only one will be chosen for the post.
| A．Since | B．While |
| C．If | D．As |
Nowadays people are more concerned about the environment __________ they live.
| A．what | B．which |
| C．when | D．where |
Tony lent me the money，__________ that I'd do as much for him.
| A．hoping | B．to hope |
| C．hoped | D．having hoped |
When the building was completed, he paid __________ the workers.
| A．off | B．for |
| C．back | D．in |