Pollution is a serious ___________ in China . PM2.5 has been increasing in recent years.

________ village where I was born has grown into ________ town.

Mike. Is that smart phone___________—- Yes. My mother bought it for me yesterday.

If you’re ________about anything, phone my office. [ ]

This job is ______ doing, but it isn’t ______ to spend so much time on it.