I ( )Jack the( ) answer

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I ( )Jack the( ) answer
A,think; doesn't know B.don't think ; know C.don't think ; knows
D.think ; don't know

正确答案应该是B,但你好像把句子写错了,应为I don't think jack know the anwser.因为像think,believe,imagine,suppose等词在句子中要否定时需否定前置,即在主句中否定,由于否定时用到了助动词,所以宾语的谓语动词用原形.

Jack __(ask) ____(answer) the question. jack tried to guess the answer by _____ hard.a. 61.No one except Jack an Tom ___ the answer. Jack—to answer the question but failed. i want know the answer () you answer the question in english?sorry,i ().() i answer I know the answer () the queation. I donnot know the answer - ---the question. I know the answer 改为否定句 I could answer sixteen of the question. I.Choose the best answer (30分) Ok,I have the answer right