-----I have to go now. -----It is raining .Don’ t ______ until(直到) the rain stops.
—I’m going to study medicine at a university —Hmm... ________ difficult.
—How was Tom’s vacation? —He____________ an relaxing trip to the countryside.
—Is Miss Green your aunt? —Yes, she is. And I love________ very much.
There ____ two concerts tomorrow evening.
— Lily, look at the flowers in the garden. — Wow, _______ beautiful they are!