-Have you ever been to Xiamen?-Yes. I _ there in 2013.A. go B. went C.have gone
Nick is never late for work.He always gets to the office________. A.on time B.in time C.at times
—Why was your class so lively,Mr.Li? —Oh,my students________in groups about the coming school trip.
—The windows are broken and need to be repaired. —I think so.They can hardly________the cold now.
Most people are________building a paper factory near here.They are worried the river will get polluted.
If there________no buying and selling of animals,there will be no killing in nature.