No one can be sure______in a million years.
–It’ll take me at least 2 hours to do this! –Oh, ______! I could do it in 30 minutes.
____the sound of the gun,many people came out, ____to see what was the matter.
John received an invitation to dinner,and with his work___,he gladly accepted it.
It is no _____arguing with Bill because he will never change his mind.
What kind of mistakes do you want to avoid ____full marks in your test?