The hazy weather has ________ for almost a week in North China. —Yes, and the government has tried to solve it.

How long has the train been away?—Sorry. I don’t know. By the time I got here, the train ________.

It’s important __________ a dancer to be healthy.[ ]

How was your visit to the Green Expo Garden？— Wonderful! We enjoyed very much during the whole trip.

Yesterday, the teacher told us that the earth ________around the sun.