What is the sense relation between Sentence A 'Johns computer needs repairing' and Sentence B 'John has a computer'?
A．Sentence A entails sentence B
B．Sentence A presupposes sentence B.
C．Sentence A is a prerequisite of sentence B
D．Sentence A is an entailment of sentence B.

A.Sentence
B.Sentence
C.
C．Sentence
D.Sentence
E.


【参考答案】

B
句子A“约翰的电脑需要修”需以句子B“约翰有一台电脑”为前提。因此句子B是句子A的前提，选B。