I listened carefully to his long boring speech, but could not ___ what he was talking about.
In the keen competition of this international tennis tournament, she________won the championship.
Many people agree that________knowledge of English is a must in________international trade today.
I have no idea if he________the meeting.
—When________again? —When he________, I'll let you know.
You should make it a rule to leave things________you can find them again.