496] If city noises _______ from increasing, people _______ shout to be heard even at the dinner table 20 years from now.

[译文] 如果城市噪音不制止，二十年后人们不得不在餐桌上吃饭就得大声喊叫才能听得见。

　 A. are not kept; will have to 　 B. are not kept; have to

　 C. do not kept; will have to 　 D. do not kept; have to

[答案及简析] A。 考查keep…from doing sth.结构的被动形式。

495] I _____ ten minutes to decide whether I should reject the offer.

[译文] 给我使分钟的时间考虑是否拒绝这个帮助。

　 A. gave 　 B. was given

　 C. was giving 　 D. had given

[答案及简析] B。 考查动词give的用法。give sb. sth ,该句中还差个宾语，故用被动形式。

494] The people are ______ young workers between the age of twenty and thirty.

[译文] 这些大部分都是20到30岁的年轻工人。

　 A. nearly 　 B. almost

　 C. mostly 　 D. most

[答案及简析] C。 mostly副词，大部分。

493] ______ the day on, the weather got worse.

[译文] 随着时间的推移，气候变得越来越糟。

　 A. With 　 B. Since

　 C. Which 　 D. As

[答案及简析] A。 with +名词 + 副词构成的复合结构，表示伴随。

492] I’m pleased ______ should be done has already been done.

[译文] 我很高兴，该做的都已经做好了。

　 A. with what 　 B. that that

　 C. by that 　 D. that what

[答案及简析] D。 be pleased that…句型中又有一个带主语从句的复合句。

491] Do you know our town at all? No, this is the first time I ______ here.

[译文] 你了解我们城市么？不，我这是第一次到这儿来。

　 A. was 　 B. have been

　 C. came 　 D. are coming

[答案及简析] B。 this is the first time that…在这个句型中，从句要用完成时态。

490] More than one hundred got saved from the fire _____ helicopter.

[译文] 直升飞机从大火中救出了一百多人。

　 A. in 　 B. with

　 C. by 　 D. from

[答案及简析] C。 表示方式用介词by。

489] ______ students in class 4 took park in that spring outing.

[译文] 4班的全部48个学生参加了春游。

　 A. 48 all 　 B. 48 whole

　 C. All 48 　 D. The whole 48

[答案及简析] C。 一般说来，whole 不能和具体的数目连用。

488] You didn’t let me drive. If we _____ in turn, you ______ so tired.

[译文] 你不让我驾车。如果你让我们轮流开车的话，你也不会那么疲劳。

　 A. has left; comes 　 B. drove; wouldn’t have got

　 C. were driving; wouldn’t get 　 D. had driven; wouldn’t have got

[答案及简析] D。 与过去事实相反的虚拟语气。

487] So loudly ______ that every one of the class could hear him.

[译文] 他说话那样大声，班上每个人都听得见。

　 A. did he speak 　 B. did he spoke

　 C. spoke he 　 D. he spoke

[答案及简析] A。 so…that…引导的从句在句首，主句要部分倒装。