答案C。比较级+and+比较级，表示“越来越…”，多音节的形容词“more and more+形容词”。

4.______ children there are in a family，_____their life will be.

A.The less，the better

B.The fewer，the better

C.Fewer，richer

D.More，poorer

答案B。the+比较级，the+比较级，表示“越……越……”，由句意得知“家里孩子越少，生活会越好”。children是可数名词，应用few来修饰。

5.The experiment was ________ easier than we had expected.

A.more

B.muchmore

C.much

D.moremuch

答案C。 much可修饰比较级，easier本身已是比较级，不能再用more.

6 Oct 15th was one of ________ days in 2003.The Shenzhou-V was sent up successfully.

A.exciting

B.more exciting

C.the most exciting

D.much exciting

答案C。根据“one of+最高级+复数名词”固定句型应选C.

7.It’s seven o’clock in the afternoon，but they are ______ having a meeting.

Aalready

B.still

C.yet

D.ever

答案B。still意为“仍旧，仍然”，这句话的意思是：现在已经是下午七点，他们仍旧在开会。

8.Remember not to speak _______ when we are in the reading room.

A.fast

B.slowly

C.politely

D.loudly

答案D。“在阅览室里不要大声说话”，副词loudly修饰动词speak.

9.“______ has this food store been in business?”

“Since 2001.”

A.How long

B.How often

C.How old

D.How soon

答案A。“since+过去时间点”为“从过去的某一时间到现在”，表示一段时间，故选“how long”。

10.——What was the weather like yesterday?

——It was terrible.It rained so ___ that people could _________ go out.

A.hardly…hard

B.hardly…hardly

C.hard…hardly

D.hard…hard

答案C。rain在句中是动词，作谓语，后面用副词修饰，hard作副词，是“猛烈地”的意思，hardly是“几乎不”的意思。