You may easily lose your way in Shanghai ______ you don’t have a map or a guide.
| A．until | B．unless | C．though | D．if |
--- ____________ does your father go to work?
--- Five times a week.
| A．How long | B．How soon | C．How often | D．How many times |
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