1.这本书不如那本书对你们有益
This book is not as helpful for you as that one.
2.现在我正忙,明天再来吧
I'm busy (at ) (the) (moment) ,please come over tomorrow.
3.下蛋 lay (eggs)
4.It took the family about an hour to take a bus there.
改为:The family spent about an hour (in) taking a bus there.