Xiaodong ______ goes to school by bike. She walks to school.

—Would you like to hang out with me this weekend? —I'd love to, ______I have a lot of things to do.

 --With the _____________ of science and technology, people can talk with each other much more conveniently than before.--But China is still a __________ country, people have to work hard to live a better life. 

The weather here is much hotter than ______ of Kunming in summer.

 --_______ do you usually go to work?--I often ride a bike.