一 Hi, Jim! Is this your bike or Mary’s?— It’s mine, not .

He hasn’t slept at all for three days. he is tired out.

_______ does she chat with friends on the Internet? –Once a week.

_____ March 28, about 20 Chinese cities turned off lights of major building for one hour. [ ]

Will you take D5581 or G7619 to Hangzhou? — G7619. I will have to more money, but it will much less time.