If certain species _____ extinct, an expert in New York, says there would be enough resources to reintroduced them in the future.
You'd better write down her phone number before you _____ it.
Ann always stands at the window and waves to_____.
She _____ someone, so I nodded to her and went away.
【2015·浙江】—Hi, John. Are you busy? —____.
【2015·浙江】一Why don’t you consider a trip to, say, Beijing or Hangzhou? 一____.