飞机的水和污水系统包括哪些子系统

I’ll never forget the day （）         I joined the army.

Those （）       not only from books but also through practice will succeed.

Did you tell your mother all    （）      you had seen on the way home?

How do you like the book?It’s quite different from     （）   I read last month.

Is there anything     （）     to you?

The Second World War     （）     millions of people were killed ended in 1945.

I’ve read all the books      （）    were borrowed from the library.

This is the biggest laboratory （）        we have every built in our school.

Have you seen the girl   （）     ?

My hometown is no longer the same    （）     it used to be.