The elevator in the teaching building was always in the summer vacation. That was why I chose to climb the stairs instead.
As soon as she saw him, shethat something had happened.
It’s getting late --- time to .
His writing is so confusing that it’s difficult to make out _____it is he is trying to express.
— We got here Tuesday afternoon. — _____ Why didn’t you call us earlier?
It is obvious to the students ______ they should get well prepared for their future.