If you have a problem _____ your composition, you had better ask your teacher ______.
_____________, she is of great help in the work.
.Nobody knew when the fire ________, but they knew it ________ the next morning.
My mother opened the drawer to _______ the knives and spoons.
He offered the information the police needed and deserved _______.
It was playing computer games_______ cost the boy plenty of time______ he ought to have spent doing his homework.