I heard the old man won ______ yuan in the lottery. —Really？What a lucky man!

Can you work out the maths problem? —Sorry, I can ______ understand its meaning.

Mr. Zhang said that he would be punctual for the appointment, _______ he were late?

Hurry, Mike! The bus is coming. —Wait a moment, please! Let me see if there’s __________ left.

Miss Yang used _____ a farmer. Now she’s a worker.