--- do you go bike riding with your father? ---Once a week.
We can ________ with each other by e-mail with the help of the Internet nowadays.
Binhai RT-Mart Supermarket (大润发超市) has been open ________.
You’d better stop ________ .You look too tired.
Zhalong ________ food and cover for a lot of wildlife.
Our teachers often advise us ________ carefully in class.