A survey has shown that 40% of those killed in traffic accidents _____ if they had been wearing seat belts.
| A．should have been saved | B．must have been saved |
| C．need have been saved | D．could have been saved |
Between the two parts of the concert is an interval, __ the audience can buy ice-cream.
| A．when | B．where | C．that | D．which |
The population of China___ to many times what it was in 1949, and most of its population ___ farmers.
| A．have grown; are | B．have grown; is | C．has grown; is | D．has grown; are |
Was it in 1969 ____ the American astronaut succeeded ____ landing on the moon?
| A．when; on | B．that; on | C．that; in | D．when; in |
--This is the first time I ____ pictures with my own camera.
--It’s time that you ___ a picture of me.
| A．took; took | B．took; will take | C．have taken; took | D．will take; have taken |
If we ___ the other road, we might have arrived here in time for meeting.
| A．take | B．had taken | C．took | D．have taken |