However，at times this balance in nature is＿＿，resulting in anumber of possibly unforeseen effects．
| A．troubled | B．disturbed | C．confused | D．puzzled |
One of the requirements for a fire is that the material _________ to its burning temperature.
| A．is heated | B．be heated |
| C．would be heated | D．shall be heated |
Fish are ________ in ice and salt until they are salt.
| A．preserved | B．served | C．freezing | D．reserved |
This is a crucial year for your relationships________ and your love life________ .
| A．in general; in particular | B．in particular; in general |
| C．as a whole; especially | D．especially; as a whole |
Rumours began to ________ about the company’s financial problems.
| A．benefit | B．digest | C．exist | D．circulate |
Vivid memories of my grandparents came ________ my mind.
| A．crowding into | B．crowding in |
| C．crowded into | D．crowded in |