高一定语从句改错,填空 追加20分

高一定语从句改错,填空 追加20分
改错
The book that you need it is in the library
those who has finished may go home
Children eat a lot of sugar often have bad teeth
i still remember the day when we spent together
i still remember the day on when i first come to beijing
it was in the kitchen where the fire broke out
is that factory which you dad once worked in?
jule1 is the day when i will never forget
填空
i will never forget the day （）or( )we worked together
he built a telescope through ( )he could study the skies
he return home early ,( )was expected
who can think of a situation ( )the idiom is often used?
最好有解析,追加20分