the teacher had the students who did not pass the exam -----

the teacher had the students who did not pass the exam ______(take)the exam again.横线上应该怎么填还有,同义句转换He cannot speak English .Neither can IHe cannot speak English .I_______ ,________.还有，同义句We find it not easy to laern English well.We find ________ _________ _________ to learn English well.PS：一条横线上只能填一个单词