【单选题】
They stood there, _________ the bus.
【单选题】
She was often seen _________ shoes for others at a shoe stand.
【单选题】
This is the farm ________ he used to work.
【单选题】
Air is very important, _________ we cannot live any more.
【单选题】
Tom bought _________ bike in this store. Where did Lucy buy ____________?
【单选题】
I was really __________ to see her here.
【单选题】
The party, ______ was held in my house, lasted for four hours.
【单选题】
The teacher entered the office, _________ by two boys.
【单选题】
When I opened the door, I saw a girl _________ there.
【单选题】
Our teachers are very nice. What about __________ ?