Before he was arrested, he had taken _______ one-month holiday, and stayed in the country with ________ 18-year-old girl, one of his students.
| A．a, a | B．an, an |
| C．a, an | D．an, a |
Is this the reason at the meeting for his carelessness in his work?
| A．he explained | B．what he explained |
| C．how he explained | D．why he explained |
It’s freezing outside. You ______put on your coat.
| A．had better to | B．had better | C．would rather | D．would better to |
Jack asked his brother Betty.
| A．did he know | B．if he knows | C．does he know | D．whether he knew |
I have heard from my father, is in American.
| A．which | B．that | C．from whom | D．who |
Swan Lake is a famous ballet(芭蕾) in four acts, ________ on a German fairy tale.
| A．basing | B．based | C．bases | D．to base |