1.Talking on the phone for over 30 minutes ______ be as harmful as listening to music at high volume through headphones for over an hour.A.must B.shall C.can D.should 2.Raising children is said to be a job parents receive the least formal training.A.

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1.Talkingonthephoneforover30minutes______beasharmfulaslisteningtomusicathighvolumethroughheadphonesf

1.Talking on the phone for over 30 minutes ______ be as harmful as listening to music at high volume through headphones for over an hour.A.must B.shall C.can D.should 2.Raising children is said to be a job parents receive the least formal training.A.
1.Talking on the phone for over 30 minutes ______ be as harmful as listening to music at high volume through headphones for over an hour.
A.must B.shall C.can D.should
2.Raising children is said to be a job parents receive the least formal training.
A.in which B.for which C.where D.that
1..我选C.不是can也可以解释为会(导致...)
2..我选C.where不是应该等于介词+which的吗?难道不是吗?那这样的话不是用where更保险才对?..怎么错了、、
求答.

1.Talking on the phone for over 30 minutes ______ be as harmful as listening to music at high volume through headphones for over an hour.A.must B.shall C.can D.should 2.Raising children is said to be a job parents receive the least formal training.A.
1、选A,must.
辨析：must 表示“肯定性推测判断”,主要用于【肯定句】；而can/could 表示“可能性推测判断”,主要用于【否定句、疑问句】.例如：
——Look,someone is coming.Who_【can】_it be?
——It _‘【must_】be Tom.
——No,It _【can't】__be him,He has gone to Beijing.
关键：原句是【肯定陈述句】,故用 must.
2、选B.
句意：养育孩子据说是父母为之接受最少培训的一项工作.
做题方法：排除法——先排除that（定语从句中作主语、宾语,此处需要状语）
A、C 同时排除——where 很多时候就等同于 in which.因此,选B.
理解方法：还原法——所有的定语从句,都可以还原为两个分句.
Raising children is said to be a job____ parents receive the least formal training
①Raising children is said to be a job
②Parents receive the least formal training 【for 】the job.父母们为了这项工作接受了最少的培训
对比：Parents receive the least formal training 【in】 the job.父母们在这项工作中接受了最少的培训【显然,语义与现实不符合——父母养育孩子过程中没有人再对他们进行培训】
因此,排除 in which,其实也就排除了where.

1.表对这个说法(打电话时间行危害)的推测的绝对肯定
2.你用where在这里翻译不同。
这里的for表父母receive the least formal training的原因

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1. C 是可行的。题目原先没有肯定性的前提. 要在美国的话，绝大多数的人会用 "can" instead of "must". 本人觉得这个题目有问题。
2. 答案 B.
解释：
Where 暗示着一个“地点”。既然此题提到"formal training", 自然就得提到 "training FOR what"? 用另一种方法来说: "Raising children is said to be a job (for which) parents receive the least formal training" --- Parents receive the least formal training FOR raising children. 所以，for which is your best answer. 对不住，本人中文表达力有限. I hope this helps. 二楼在第二题的见解非常完整。

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