He wonders ,Must the books be returned on time 合成复合句

问题描述:

He wonders ,Must the books be returned on time 合成复合句
He wonders if the books ( ) ( )returned on time

must be我还想问两道:1He can`t swim,I can`t swim,either.(改为同义句) He can`t swim ( )can ( ) 2His father doesn`t allow him to fail the test.(改为被动语态)He ( )()to fail the test1 NeitherI 2 isn't allowed