In the Gulf of Mexico the animals' presence close to shore means their usual habitat is badly polluted, and the crowding could ________ mass die-offs as fish run out of oxygen.
| A．result from | B．benefit from | C．devote to | D．result in |
________to sunlight for too much time will do harm to one's skin.
| A．After being exposed | B．Having exposed | C．Being exposed | D．Exposed |
--Shall we go to visit Uncle Lee this weekend?
--_________. I wonder whether I will be free that day.
| A．It doesn’t matter | B．It all depends |
| C．I’m afraid we should | D．I don’t mind |
No one is allowed ______ in the classroom.
| A．smoking | B．smoke | C．smoked | D．to smoke |
The rice made _____ possible to produce one-third more of the crop in the same field.
| A．that | B．this | C．one | D．it |
I regret ______ you that you will miss your flight if you don’t hurry up. You have only twenty minutes to go.
| A．to tell | B．telling | C．having told | D．to telling |