Each time I ________ a good essay when reading newspaper , I cut it out and keep it.

There are only _________ new words inthe passage, but I know _________ of them.

So many people violate traffic regulations that we ____ put too much emphasis on the importance of traffic safety.

He hurried to the railway station out of breath, only _______ that the train leaving for Shanghai had been away for half an hour.

I didn’t have to work all weekend — I did it by_______.