请告诉改错题（已有答案）为什么这样改?最好再介绍一下相应的用到的语法和句法知识.答得好再追加复习题31.Neversayanything(A)behindaperson'sbackif(B)youwouldn’t(C)sayto(D)

Question

请告诉改错题（已有答案）为什么这样改?最好再介绍一下相应的用到的语法和句法知识.答得好再追加
复习题3
1.Never say 【anything (A)】 behind a person's back 【if (B)】 you 【wouldn’t (C)】 say 【to (D)】 his wife
B 改为that
2．【It is not (A)】 because they were afraid of earthquakes,【but (B)】because there was a trend 【for living (C)】in the suburbs【so (D)】after World War ∏ many San Franciscans left the city houses and moved to the suburb
D 改为that
3.【As (A)】 a general observation,many physicians 【regret (B)】【having never (C) 】taken 【a course (D) 】In the history of medicine
C 改为 never having
4.It is difficult for us to 【explain phenomena (A)】 【which (B)】 we have little 【or (C)】【not direct (D)】 knowledge
D 改为 of which
5.There 【lived (A)】in the village the peasants who enjoy no 【sickness (B)】benefits,【no old age pensions (C)】【not any (D)】holidays.
D 改为 no

Answer 1

1.Never say 【anything (A)】 behind a person's back 【if (B)】 you 【wouldn’t (C)】 say 【to (D)】 his wife 答案：B 改为thatthat关系代词引导定语从句,在从句中作say的宾语.修饰不定代词anything,everythin...