Without facts,we can’t form a worthwhile opinion for we need to have factual knowledge our thinking. [ ]

The policeman told us __________ the street when the traffic light was red.

The city was destroyed by an earthquake andit ________nearly five years before everything came back to normal .

Why didn’t you come to Susan’s birthday party We you all the evening.

Scientists say it may be five years ______ it is possible to test this medicine on human patients