172. Since the disaster of September 11, American economy has got into a jam. The underlined part probably means _____.
I counted the people the activity, and there were 286 of them.
They had kept working for several weeks everything was in order.
The headmaster who had the grand ceremony waved to the crowds with a smile .
When the market economy is introduced, many factories will not .
This is an illness that can total blindness if it is left untreated.