At times the balance in nature is ______，resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |
---Need you leave so soon?
---Yes, _____, I’m afraid.
| A．I need | B．I do | C．I have to | D．I must to. |
There is a little time left. We _____ hurry.
| A．should | B．would | C．mustn’t | D．needn’t |
The Internet has made it possible ______ in a very convenient way around the world.
| A．for people to communicate | B．for people communicating |
| C．for people communicate | D．for people to be communicated |
What he had said was ______ and made us ______.
| A．surprised...surprising | B．surprising...surprised |
| C．surprised...surprised | D．surprising...surprising |
Janet is delighted _____ the first prize in the poem recitation contest.
| A．to award | B．to be awarded |
| C．to have been awarded | D．to be awarding |