The students are reviewing their lessons to ( ) ( )（做准备）the next exam还有一题同义句转换He had a good rest after he had lunch=He ( ) ( ) a good rest ( ) he had lunch

The students are reviewing their lessons to ( ) ( )（做准备）the next exam还有一题同义句转换He had a good rest after he had lunch=He ( ) ( ) a good rest ( ) he had lunch
The students are reviewing their lessons to ( ) ( )（做准备）the next exam
还有一题同义句转换
He had a good rest after he had lunch
=He ( ) ( ) a good rest ( ) he had lunch

The students are reviewing their lessons to ( ) ( )（做准备）the next exam还有一题同义句转换He had a good rest after he had lunch=He ( ) ( ) a good rest ( ) he had lunch
1,填prepare for
2,didn't have,until