—Excuse me, this shirt is too big for me. Would you mind giving me smaller one ?—__________. Here you are.
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.