Bob called to tell his mother that he couldn’t enter the house, for he ________ his key at school.
-I want to see Mr. White. We have an appointment.
-I'm sorry, but he is not ________ at the moment, for the meeting hasn't ended.
busy
active
concerned
available
My room is a mess, but I __________clean it before I go out tonight. I can do it in the morning.
daren't
shouldn't
needn't
mustn't
-Albert's birthday is on next Saturday, and I'm planning a surprise party for him.
-__________. I'll bring some wine.
Sounds like fun
It depends
Just a minute
You are welcome
--Going to watch the Women's Volleyball Match on Wednesday?
--_________! Will you go with me?
You there
You bet
You got me
You know better
The disappearance of dinosaurs is not necessarily caused by astronomical incidents. But _________explanations are hard to find.
alternative
aggressive
ambiguous
apparent