My uncle from Hongkong has changed so much that I could hardly ________ him at the airport. 

—Did you listen to the report last Friday?—Yes, it was about the shortage of immigrant workers. That was the first time I ________ about the subject.

 As soon as little Tom had ________ a little from his operation at his back, his first thought was to get   out to meet his friends.

 We arrived at work in the morning and found that somebody ________ into the office during the night.(2011·江西)

一Did Tom enjoy seeing his old friends yesterday?—Yes，he did．He _____ his old friends for ages．