John is unhappy because he failed in the English exam. 该同义句. John is unhappy because he( ) ()the English exam.
问题描述:
John is unhappy because he failed in the English exam. 该同义句. John is unhappy because he( ) ()the English exam.
答
有is 的话不能用do。 所以用isnot pass.
答
John is unhappy because he (didn't) (pass) the English exam.