Rick has learned a lot about Chinese culture he came to China.
| A．before | B．when | C．until | D．since |
He plays ____________ piano every day to become the champion of his country.
| A．the | B．a | C．/ | D．an |
It is impossible___________ so much work in an hour.
A. finish B. to finish C. finishing
My family went on a _________ trip last month.
A. two weeks B. two-week C. two-weeks
My family went on a _________ trip last month.
A. two weeks B. two-week C. two-weeks
While you _________ your trip, I was busy ________ for my exams.
A. enjoyed, preparing B. were enjoying, preparing
C. were enjoying, to prepare