Geography also ___________making dialects.
| A．plays a part in | B．comes up | C．suffers from | D．digs out |
In the experiments, the scientists found that water __________ at 100℃.
| A．boils | B．boil |
| C．has boiled | D．had boiled |
I am sure your parents are proud __________ you.
| A．of | B．in |
| C．up | D．to |
—Are you used to __________ in the north with the old couples?
—Yes, I am glad to find out that coal is used __________ electricity for home use.
| A．live; to produce | B．living; to produce |
| C．to live; produce | D．living; producing |
__________ be late for the first class, Bill took a taxi instead of riding to school that morning.
| A．In order not to | B．So as not to |
| C．In order to not | D．So as to not |
—Bob, are you free at the moment? I have to ask you some questions.
— __________.
| A．It's a pleasure | B．Ask, please |
| C．Help yourself | D．Yes, go ahead. |