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

Nowadays,people get news around them and about the world from ________ media, on TV, by radio, in the newspaper or on the Internet.[ ]

– I tried my best. ——-Yes, but ______ .

I really don’t know _____ I put my wallet

—What do you think of store shopping in the future?—Personally, I think it will exist along with home shopping but ________.[ ]