China has became the third nation to send a person into space______________.

We are happy to see our city is developing ________ these years than before.

Did you telephone Uncle Sam our plan for the Christmas holidays on his farm? — Yes, he was happy about our arrival, and he eagerly asked when ______.

Chen Lin, who teachesEnglish?—— Mrs. White. She has lived in China for years.Chinese is very good.

Be quick! Jim _______________ for us downstairs.