It is strange that such a thing ______ in your school．
| A．will happen | B．happens | C．should happen | D．happened |
Little ________ about his own safety, though he was in great danger himself.
| A．does he care | B．did he care |
| C．he cares | D．he cared |
Not a single song ________ at yesterday’s party.
| A．she sang | B．sang she |
| C．did she sing | D．she did sing |
Not until all the fish died in the river ________ how serious the pollution was.
| A．did the villagers realize | B．the villagers realized |
| C．the villagers did realize | D．didn’t the villagers realize |
I finally got the job I dreamed about. Never in all my life ________ so happy!
| A．did I feel | B．I felt |
| C．I had felt | D．had I felt |
The old couple have been married for 40 years and never once ________ with each other.
| A．they had quarrelled | B．they have quarrelled |
| C．have they quarrelled | D．had they quarreled |