Unit 2You should always go with someone.1 ． Thanks to improvements in both health care and personal safety,most people are living healthier, longer lives. 由于医疗保健及人身安全的改善，大多数人活得更健康、更长寿。thanks to 为介词短语，意为“多亏，由于”。如：Thanks to your advice, much trouble was avoided.多亏了你的建议，避免了很多麻烦。thanks for 表示“因……而感谢”，后接名词、代词或动词的-ing 形式，相当于 thank you for 。如：Thanks for writing back to me. 谢谢你给我回信。① 多亏了老师的帮助，他在数学上取得了巨大进步。________ ________ the teacher's help, he's made great progress inmaths.② 谢谢你的邀请，我玩得很开心。________ ________ your invitation, and I had a great time.2 ． In the past, people's jobs required more physical effort. 在过去，人们的工作需要更多的体力劳动。require 意为“需要”，后接名词、动词不定式或动词 -ing 形式。require 后接动词不定式时，应用其被动形式，即 sb./sth.require(s) to bedone ；后接动词 -ing 形式时，应用其主动形式表示被动意义，即sb./sth.require(s) doing 。如：ThankstoforThanksThe baby requires to be looked after.＝ The baby requires looking after. 婴儿需要照顾。These new employees require ________.A ． to trainC ． to be trainedB ． to trainingD ． trainC 题意：这些新来的员工需要培训。 require 作“需要”讲时，后接名词、动词不定式的被动形式或动词 -ing 形式； train在此作动词，意为“培训”，故选 C 。3 ． Teenagers don't need as much sleep but it's important to get abouteight hours' sleep. 青少年不需要那么多睡眠，但睡足八小时很重要。“ 数词＋名词所有格”可作定语修饰名词，当所有格前的数词大于一时，要用复数名词的所有格。如：Don't worry.It's only about five minutes' walk.不要担心，只有五分钟的步行路程。They will fly to Hawaii for ________ holiday.A ． two weekC ． two weeksB ． a two weekD ． two weeks'D 题意：他们将飞往夏威夷度两周的假期。“数词＋名词所有格”作定语，当数词大于一时，要用复数名词的所有格。
