In order to help the police, the eyewitness described what he had seen very carefully not to______ any key clues.
With some technical problems to be solved, it may be a while the system is put into use.
Only when you stay with local people for a period of time will you have better understanding of life here.
The purpose of her talking to me last night actually _______this: That I shall never trust him any more in future.
The price system is a complex network composed of the prices of all the products bought and sold in the economy as well as of a great number of services.
I ______ tell you with certainty that he won’t be able to finish it before the deadline.