Mr. Black asks the kids ________ in the river, because it’s too dangerous.
Yesterday I met Jim. We ____________ each other since we _________ middle school.
---When did you return to China?---_________________.
The plane ____________when I got to the airport. I nearly missed it.
The rain has stopped. Why not ___________ the raincoat?
---I am going to Nanjing and stay there for a week. ---____________ you are there, would you please buy some books for me?