It has been proved ____ several new kinds of medicine____ a positive effect on the cure of H7N9.
| A．which，has | B．if, has |
| C．that, have | D．what, have |
On the walltwo large portraits.
| A．hangs |
| B．hang |
| C．hanged |
| D．hanging |
Nobody to smoke in the cinema.
| A．allows |
| B．a]low |
| C．is allowed |
| D．are allowed |
The police the murderer everywhere when he suddenly appeared in a theatre.
| A．is searching for |
| B．were searching for |
| C．are searching for |
| D．were searching |
--- I've got a difficult task on hand I really want to finish it quickly.
--- Don’t hurry.Have more patience for that.
| A．It’s no big deal. |
| B．Rome wasn't built in a day. |
| C．Just wait and see. |
| D．Don’t waste your time. |
She is an excellent student in our class, and she always herself in studies.
| A．buries |
| B．hides |
| C．covers |
| D．leaves |