After some time in the dark cave, our eyes slowly _____ the dark.
The country has already sent up three unmanned spacecraft,the most recent ________ at the end of last March.
________tomorrow’s lessons,I have no time to play with you.
—I would like to buy an expensive camera. —Well.We have several models________.
The little boy still needs the________20 dollars to do with some things________.
________the working efficiency,the boss allows the employees to have a coffee break.