高手 请问 ______i go back before lunch? No, I don't t手 请问 ______i go back before lunch?No, I don't think you_______.A.need;must. B.do;need toC.must;have to. D.may;ought to这道题该选什么.每个选项错在哪里?先拜谢了!

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高手 请问 ______i go back before lunch? No, I don't t手 请问 ______i go back before lunch?No, I don't think you_______.A.need;must.     B.do;need toC.must;have to.  D.may;ought to这道题该选什么.每个选项错在哪里?先拜谢了!
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高手 请问 ______i go back before lunch? No, I don't t手 请问 ______i go back before lunch?No, I don't think you_______.A.need;must. B.do;need toC.must;have to. D.may;ought to这道题该选什么.每个选项错在哪里?先拜谢了!
高手 请问 ______i go back before lunch? No, I don't t
手 请问 ______i go back before lunch?
No, I don't think you_______.
A.need;must. B.do;need to
C.must;have to. D.may;ought to
这道题该选什么.每个选项错在哪里?
先拜谢了!

高手 请问 ______i go back before lunch? No, I don't t手 请问 ______i go back before lunch?No, I don't think you_______.A.need;must. B.do;need toC.must;have to. D.may;ought to这道题该选什么.每个选项错在哪里?先拜谢了!
答案:C
翻译:--我必须在午饭前回去么?--不,我认为你不必(在午饭前赶回去).
此题考查情态动词的用法.
1.A错在用need提问时,一般是不会用must回答的,而且must的否定意思是“禁止,不允许”(答语为否定转移,其实是否定think后面的宾语从句);
2.B同样错误,do提问的问句是不可能用need来回答的;
3.同理,may提问的问句也不可能用ought to回答(should提问方可);
4.must的否定不用mustn't,而可以使用not have to,所以答案C为正解.
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