1. The question_____ at the meeting tomorrow is very important.

A. to discuss

B. being discussed

C. to be discussed

D. will be discussed

【答案】C 本题考查非谓语动词的用法。本句为动词不定式的被动式做定语，表示将要发生的动作。

2. The way I thought of _____ the animal was of great value.

A. protecting

B. protect

C. being protected

D. to protect

【答案】D我提出的那个保护动物的方法非常有价值。不定式做定语修饰The way。

3. Reading is an experience quite different from watching TV; there are pictures ____ in your mind instead of before your eyes.

A. to form

B. form

C. forming

D. having formed

【答案】C。有图片在你心里形成，而不是在眼前。

4. There may be, somewhere outside the solar system, intelligent life____ messages to us.

A. sends

B. sent

C. sending

D. has sent

【答案】C 两个逗号中间为插入语，在分析句子结构时，可以省略;略去后得There may be intelligent life ___messages to us.因此后面的部分应该是intelligent life 的定语，选sending，相当于(that is )sending…; 全句意为“在太阳西外的某处，可能有某种正在项我们发送信息的有智慧的生命。”

5.The last one ________ pays the meal. Agreed!

A. arrived

B. arrives

C. to arrive .

D. arriving