We must try our best to stop pollution ______a low-carbon(低碳)life.

s Tu Youyou once commented, “In order to make some achievements and ______ yourself in your field, there are certain things you must do.”

________ when does that shop stayopen —About midnight.

I’m _____, and I have a _____sister.

一Let’s start to make dinner!一Mom , it’s best to read the instructions using the new microwave oven.