---Where’s Mary? I didn’t see her this week.--- I didn’t see her, _____.
He hurried to the railway station for the last train but didn’t it.
The flight to Guangzhou had to be because of the heavy snow.
-Sandy is upset now. Why don’t we ?-That’s a good idea.
You stand in line while waiting for the bus.
By the time he arrived at the airport, the plane .