2016年乒乓球新规则:we used a bookshelf to store books.=a bookshelf ()()()()books.

we used a key to lock doors.=a key ()()()locking doors. we used a bookshelf to store books.=a bookshelf ()()()()books. The things we used to say.. We're all we used to be i have a { we we we } ? on satur(n)days we used to sleep do you still remeber how we used to be 跪求Sopor Aeternuson 的Saturndays We Used To Sleep WE STILL A FRIEND? We have a physics class.