Some modern art is so abstract that the painter only concentrates on certain qualities of the object, using color, line and shape to them．
| A．respect | B．rescue | C．reason | D．represent |
In the past several weeks, many cities in Northern China from heavy fogs and severe cold.
| A．had suffered | B．have been suffering | C．were suffered | D．suffered |
she was out of the room, he took a quick look at the papers on her desk.
| A．If | B．While | C．Though | D．Unless |
Visitors to the hills are greeted by signs them to look out.
| A．warn | B．to warn | C．warning | D．warned |
It is already well understood causes the global warming.
| A．what | B．when | C．that | D．how |
— Jim has gone to Britain to see a modern art exhibition.
— Oh, really? Do you know when he ?
| A．leaves | B．will leave | C．was leaving | D．left |