It’s too cold. Would you mind closing thewindow– ______ . But please don’t do it now.

s suggest that parents should let their child do tasks that he is physically and mentally capable of doing by himself, ______ will help to build a self-confident kid.

It was half a year________my good friend returned to his hometown.

This book _______ her 10 yuan, but I only ________ 5yuan on the same one.

He bought some books, ______ were expensive.