Only after Mary read her composition the second time_________ the spelling mistake.

________ when your ticket has been checked will you be allowed to take the plane.

----Why can’t I smoke here?
----At no time_____in the meeting room.

— What was it that caused the party to be put off?
— ______the invitations.

---- David has made great progress recently.
---- ________ and ________.

----I heard Tom was badly injured in the accident.
----______. Let’s go and see him.

I failed again in the examination and only then _____ how much time I had wasted.

So sudden ________that the residents had no time to escape.

By no means      true that all native speakers of English know their own language very well．

China is a peace-loving country and _____no circumstances _____ first use nuclear weapons.