—Excuse me，sir. The shoes are a bit small for me.
—Don’t worry. I’ll change them for a size
| A．smaller | B．smallest | C．larger | D．largest |
He found the key _____the door.
A.of B.to C.for
We all felt _____after we knew the _____news.
A.exciting, exciting B.excited, exciting C.exciting, excited
John didn’t go to bed ______he finished his homework.
A.until B.after C.while
It took him half an hour _____ the work.
A.doingB.to do C.did
The teachers are very friendly ______their students.
A.to B.at C.on