—— I didn’t see her yesterday. —— Oh, but you _______________.
In the past several weeks, many cities in Northern China from heavy fogs and severe cold.
she was out of the room, he took a quick look at the papers on her desk.
Visitors to the hills are greeted by signs them to look out.
It is already well understood causes the global warming.
— Jim has gone to Britain to see a modern art exhibition. — Oh, really? Do you know when he ?