It is pretty well understood_______controls the flow of carbon dioxide in and out of the atmosphere today．
| A．that | B．when | C．what | D．which |
Those who put in many hours of overtime will receive a percentage of their salary as a ________.
| A．sympathy | B．bonus | C．service | D．prize |
This ________ girl is Linda’s cousin.
| A．pretty little Spanish | B．Spanish little pretty |
| C．Spanish pretty little | D．little pretty Spanish |
I was not _________her presence till she spoke to me.
| A．aware | B．aware about | C．aware of | D．aware to |
The students are forbidden____ , unless they have special passes after 11 p.m. in the school.
| A．to stay out | B．from staying out | C．staying out | D．not to staying out |
When ____ , the library will be open to the public next year.
| A．completing | B．being completed | C．to be completed | D．completed |