At times the balance in nature is ______，resulting in a number of possibly unforeseen effects.
| A．troubled | B．confused | C．disturbed | D．puzzled |
When _________ different cultures, we often focus our attention on the differences without noticing many similarities.
| A．having compared | B．compared | C．being compared | D．comparing |
With the little __________ money, the child told me in a ___________ voice that on the way home most of his money had been stolen.
| A．remained; trembled | B．remained; trembling |
| C．remaining; trembled | D．remaining; trembling |
Can you imagine that a smart man like him ___________ make such a stupid mistake?
| A．might | B．should | C．would | D．need |
---Remember how we met for the first time, Dick?
---Of course I do. You _________ to the teachers' office hurriedly and ___________ me.
| A．had walked; weren't noticing | B．were walking; didn't notice |
| C．had been walking; noticed | D．walked; had noticed |
The new CEO asked that all inter-office communications ______ in writing rather than in person, ______ possible.
| A．have been made; whoever | B．would be made; whichever |
| C．be made; whenever | D．were made; whatever |