The number of students in our school ____about 30,000 and ______them study hard.
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.
Our chemistry teacher a better way of working out the problem this morning.