______ clean the classroom is! Who cleaned it?01
| A．How a | B．What a | C．What | D．How |
__________ it’s very difficult, remember not to give up until the last minute.
| A．Until | B．Unless |
| C．Although | D．Since |
--Shall I close the door?
--No. Just _____it open.
| A．offer | B．try | C．push | D．leave |
__________car traffic in city centers and make the air cleaner, some countries made rules that drivers should pay extra money if they drive in the city centers.
| A．Reduce | B．Reducing |
| C．To reduce | D．Reduced |
On March 8th, a Malaysian plane to Beijing lost contact. The passengers on board are _________Chinese. All Chinese people are extremely worried about their safety.
| A．mostly | B．properly |
| C．clearly | D．hardly |
More and more people are used to shopping online because it costs _______money and saves _______time.
| A．more; less | B．more; fewer |
| C．fewer; more | D．less; more |