1．听短文，根据你所听到的内容，选择正确答案．（短文读两遍）
16．How old was the American officer？
A．Fifty years old． B．Sixty years old． C．Seventy years old．
17．What did the officer do for the children？
A．To have an English lesson． B．To give a report． C．To tell a story．
18．Where were the children sitting？
A．In a big meeting hall． B．On the playground． C．In a big classroom．
19．When did the officer study in the school？
A．Fifty years ago． B．Thirty years ago． C．Fifteen years ago．
20．Who answered the officer's question？
A．A little girl． B．A tall boy． C．A short boy．
