_______ in the queue for half an hour, Tom suddenly realized that he had left his wallet at home.

The _______ boy was last seen _______ near the East Lake.

Though I have often heard this song ______, I have never heard you ______ it.

— Can you tell us what is important to a businessman?
— ________ information.

________that I could use a special piece of cloth to attract people's attention, I decided to do an experiment.

We walked a long way to see him off, only _____ that he had just left.

—I’m considering     to Qingdao by air for my holiday.
—Why not try     by ship for a change?

The trees     by the Japanese visitors are growing well.

______ when to leave, I could only stay at home, _____ nothing.

The professor kept telling us that the future _____ to the well-educated and I kept wondering where I _____ of it.