When the question _____ at the meeting, no one could answer it.

He is _________to staying up late and getting up late.

You’d better stop complaining again and again. Otherwise, you’ll ______ quarreling with Rose again.

On the annual International Volunteers Day, the world ______ the work of millions of people who give their time to help others．

Prices reach equilibrium at the level at which quantity demanded ______ quantity supplied.