Recently some studies have found that learning ____________ second language can lead to _______________ increase in one’s brain power.
| A．a; the | B．不填; the | C．a; an | D．the; an |
Having failed to do what I ________ to，I’m afraid of being scolded by my parents.
| A．am expected | B．will be expected |
| C．was expected | D．have expected |
Drunk driving used to occur ________ in our city，but now such cases are rare.
| A．practically | B．generally |
| C．frequently | D．gradually |
—Could you help me with the math problem?
—________ Your must be barking up the wrong tree.
| A．A pleasure. | B．Hang on a minute. |
| C．What’s the point? | D．Are you kidding? |
________ operation was very successful indeed，which was ________ comfort to the concerned mother.
| A．The；/ | B．An；the |
| C．An；a | D．The；a |
We’re living in ________ people call “Information Age”，so everything is possible.
| A．what | B．that |
| C．which | D．why |