Which sign is made for safety?
—I called you this morning, but nobody answered. —I _______ the flowers in my garden at that time.
Helen caught a cold the day before yesterday. But she’s ______ today.
—How many students are there in your school? —About_______ students, I think.
Tom is ______ of the six boys.
——Must I take the medicine every day?—No, you _______.
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