Large quantities of polluted water_____ into the sea so that lots of fish died.
| A．is flowing | B．was flowing | C．are flowing | D．were flowing |
When I stayed in the countryside, I enjoyed ___ leisurely walk on the country road, and felt ___ warmth of the sun on my face.
| A．/; the | B．a; a | C．/; a | D．a; the |
-------- Shall we go out to play basketball?
------ ______? It’s my favourite.
A How come B Why not C So what D What for
______is the population of Shanghai?
A How much B How many C What D which
The question is ______ is responsible for what has happened.
A what B where C who D whose
No one ______ this building without the permission of the police .
A is leaving B is to leave C has left D will be leaving