Though ______, many laws of nature exist.
| A．not having been discovered | B．having not been discovered |
| C．not having discovered | D．having not discovered |
They are much more interested in what you are saying，__________ how you are saying it.
| A．other than |
| B．more than |
| C．less than |
| D．rather than |
But for the bad weather, our parents __________ us to go to the outskirts for picnic yesterday.
| A．will allow |
| B．should allow |
| C．allowed |
| D．would have allowed |
-Can I smoke here?
-Sorry, we don't allow __________ here.
| A．people smoke |
| B．to smoke |
| C．people smoking |
| D．smoking |
In April, thousands of holiday makers remained __________ abroad due to the volcanic ash cloud.
| A．sticking |
| B．stuck |
| C．to be stuck |
| D．to have stuck |
He got to the top of the highest building in order to get a good __________ of the city.
| A．sight |
| B．scene |
| C．look |
| D．view |