How long ago ___ studying at the middle school?

What would you do if you _____ an alien in the street

1—How do you find the talkgiven by Mr. Smith—_________.

ion, please All of you students _______remain in their seats until all the papers have been collected

Amazing! You _____ have won the first prize in thenational English speech contest!I’m lucky that all my efforts have finally paidoff.