He complained that this was the third time he _________ of the changes of the meeting.
| A．is informed | B．was informed |
| C．has been informed | D．had been informed |
Not until all the fish died in the river how serious the problem of water pollution was.
| A．did they realize | B．they did realize | C．had they realized | D．they had realized |
When I was twenty, I had to before graduation and work in a clothes shop to help support my family.
| A．come out | B．stay out | C．leave out | D．drop out |
After the quarrel, I tried all my best to fix the misunderstanding between us, but all my efforts seemed .
| A．in vain | B．in case | C．in time | D．in trouble |
Though many extra planes and trains are used to carry passengers, traffic tools are still
needed during “May Day” holidays.[
| A．eagerly | B．badly | C．equally | D．slightly |
--- Why are you so late?
--- I got stuck in the traffic jam, or I earlier.
| A．arrived | B．had arrived | C．would arrive | D．would have arrived[ |