—Who is _______ man in a black hat?—It's Jim Brown. We often play _______ basketball together (一起).
Sir, you should ________ at the red light, but you didn’t.
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.