1、Unit 2,You should always go with someone.,1Thanks to improvements in both health care and personal safety, most people are living healthier, longer lives.由于醫(yī)療保健及人身 安全的改善，大多數(shù)人活得更健康、更長壽。,thanks to 為介詞短語，意為“多虧，由于”。如：,Thanks to your advice, much trouble was avoided. 多虧了你的建議，避免了很多麻煩。,thanks for 表示“因而感謝”，

2、后接名詞、代詞或動詞的,-ing 形式，相當(dāng)于 thank you for。如：,Thanks for writing back to me.謝謝你給我回信。,多虧了老師的幫助，他在數(shù)學(xué)上取得了巨大進步。,_ _ the teachers help, hes made great progress in,maths.,謝謝你的邀請，我玩得很開心。,_ _ your invitation, and I had a great time.,2In the past, peoples jobs required more physical effort.在過去， 人們的工作需要更多的體力勞動。,re

3、quire 意為“需要”，后接名詞、動詞不定式或動詞-ing 形式。 require 后接動詞不定式時，應(yīng)用其被動形式，即 sb./sth.require(s) to be done；后接動詞-ing 形式時，應(yīng)用其主動形式表示被動意義，即 sb./sth.require(s) doing。如：,Thanks,to,for,Thanks,The baby requires to be looked after. The baby requires looking after.嬰兒需要照顧。 These new employees require _.,Ato train Cto be trai

4、ned,Bto training Dtrain,C,題意：這些新來的員工需要培訓(xùn)。require 作“需要”,講時，后接名詞、動詞不定式的被動形式或動詞-ing 形式；train 在此作動詞，意為“培訓(xùn)”，故選 C。,3Teenagers dont need as much sleep but its important to get about eight hours sleep.青少年不需要那么多睡眠，但睡足八小時很重要。 “數(shù)詞名詞所有格”可作定語修飾名詞，當(dāng)所有格前的數(shù)詞 大于一時，要用復(fù)數(shù)名詞的所有格。如： Dont worry.Its only about five minutes walk. 不要擔(dān)心，只有五分鐘的步行路程。 They will fly to Hawaii for _ holiday.,Atwo week Ctwo weeks,Ba two we