I know a little bit about the city as I __________ there for one year in my youth.
| A．am studying | B．had studied | C．studied | D．have studied |
A month’s ______ is required from whichever party wishes to end the agreement.
| A．message | B．letter | C．sentence | D．notice |
He was ______ medical student before he turned _______ engineer.
| A．a; an | B．the; the | C．a; / | D．/; an |
He’s so ill that his father has to send for _______ doctor.
| A．one | B．some | C．a | D．the |
The price of _______ bike will partly be determined by the sort of ______ material used.
| A．the; the | B．the; / | C．/; the | D．/; / |
Jumping out of _______ train running at a speed of 200 kilometers per hour is quite _____ dangerous practice.
| A．/; the | B．/; a | C．a; a | D．the; the |