4. We have made small changes to the rules for (　　) for instant credit.

　　A. applying

　　B. applied

　　C. apply

　　D. applies

　　【答案】A。For 介词，表目的，且介词后加动词 ing 形式。A 项正确;B 项过去式;C项原形;D 项 apply 的第三人称单数。句意：我们对申请即时信贷的规则做了一些小改动。故本题正确答案选 A。

　　5. Advertising is (　　) into every aspect of our social life,and conveying cultural messages　with the advantage of mass media.

　　A. penetrating

　　B. to penetrate

　　C. penetrated

　　D. being penetrated

　　【答案】D。考察动词的被动语态。根据句意可知主语是物，不会主动渗透到生活中，所以是被动语态，be done 的结构，又因空格前是系动词 is，后跟 ing 形式。句意：广告已渗透到我们社会生活的方方面面，并借助大众传媒传播文化信息。故本题正确答案选 D。

　　6. Some women (　　) a good salary in a job instead of staying home, but they decided not　to work for the sake of the family.

　　A. would make

　　B. must take

　　C. could have made

　　D. should have made

　　【答案】D。Should have done 本应该做却没有做。句意：一些女性希望有一份好工作，而不是呆在家里，但她们决定为了家庭而放弃工作。故本题正确答案选 D。