Protect your hearing. Don’t wait until you ________ hear a thing.
needn’t
mustn’t
shouldn’t
can’t
He finds watching English movies frustrating because the people speak too quickly.
My cousin gave up the chance of working abroad and returned to his hometown.
Maria called him three times yesterday, but nobody answered.
—Do you know __________ in China tomorrow?—In the morning.
The lovely postcards __________ to Ann last week.