Why not look up the new word in a dictionary _____ you don’t know it ?
There is little time left, so the chairman asked me to _ _my speech to 20 minutes.
Great changes _______ in his hometown in the last twenty years.
--- How is the lecture going?--- The lecture has ended. You’re ________.
An increasing number of people ________ the importance to physical exercise.
—Who______ it be that is knocking at the door?—It ______ be Father, but I’m not sure.