本期练习重点：主谓一致、特殊句型、比较结构、数词
1. Not only they bring snacks and drinks, but they also brought cards ___1___
for entertainment when they had a picnic in the forest.
2. The boy wanted to ride his bicycle in the street, but his mother told him not. ___2___
3. The research is so designed that once begin nothing can be done to ___3___
change it.
4. Generally speaking, when taking according to directions, the drug ___4___
has no side effect.
5. In nature, there really exists many substances through which currents can ___5___
not follow at all, such as rubber, plastics, ect.
6. The consolidation of the crumbling walls and towers have been carried ___6___
out in accordance with a program agreed with by the Department of the
Environment.
7. So loudly the students read their lessons that people could hear them out ___7___
in the street.
8. E-mail is a convenient, highly democratic informal medium for
conveying messages that conform well to human needs. ___8___
9. Important for parents to learn is the pratical techniques for self-help. ___9___
10. There ought to be much anxiety over the perceived risk of mountain ___10___
climbing than exists in the public today.
11. The movie is as good, if not better than, the movie I saw last night. ___11___
12. Despite the wonderful acting and well-developed plot,
the three-hours movie could not hold our attention. ___12___
13. It has been a regrettable lack of communication between the union ___13___
and the management.
14. With the miniaturization of the structural components the weight
of these electric devices has decreased by two-five. ___14___
15. That is important that the hotel receptionist make sure that guests ___15___
are registered correctly.
答案及解析:
1.only后加did
否定词not only提前，句子主谓要倒装。根据后面一句的时态可判断为过去时，故要在they前加助动词did。
注：not only…but also连接两个主语时，不用倒装，如：
Not only the students, but also the teacher wishes for a holiday.
2. not后加to
本句是省略句，原句应该是The boy wanted to ride his bicycle in the street, but his mother told him not to ride bicycle in the street.在动词不定式结构中，为了避免重复，常常省略不定式结构中的动词原形，只保留to。
3. begin -> begun
在以when, while, if, as if, though (although), as, whether, once等连词引导的时间、原因、条件、方式、让步等状语从句中，常常省略相同的主语或作主语的代词it以及be动词，保留现在分词、过去分词、介词短语、不定式等。 本题中once后省略了(it is) begun。
4. taking -> taken
5. exists -> exist
此处是倒装句，主语是many substances。
6. have -> has
本句的主语是The consolidation（为单数），谓语是have，of the crumbling walls and towers只是后置定语作修饰成分，所以谓语也要用单数。故将have改为has。
7. loudly后加did
so… that 句型中的so 位于句首时，需倒装。
8. conform -> conforms
此处的that引导的是定语从句，先行词是medium，所以从句的谓语动词要用第三人称单数。
9. is -> are
本句为全倒装句，真正的主语是the pratical techniques，所以系动词要用复数形式。
10. much -> more
11. the前加as
此处if not better than 是插入语，完整的结构是as…as..结构。
12. three-hours -> three-hour
根据语法规则，数词+名次构成复合形容词，作定语修饰名词。复合形容词中间要加连字符，而且名词要用单数。
13. It -> There
此处是there be句型。
14. two-five -> two-fifths
当表示几分之几时，分子用基数词，分母要用序数词；如果分子大于一的话，那么分母加s。例如：3分之1：one third；4分之3：three forths。还有另一种表达就是 基数词+ in / out of +基数词，例如：3分之1：one in three或one out of three；4分之3：three in four或three out of four.
15. That -> It
此处是形式主语，只能用it。本句的make形式没有错，it is important that后面从句要用should +动词原形的虚拟语气，should可省略。