Competition is increasing among businesses which sell planes.
It is said the conference is __ (hold)in this hall next month.
What did they decide to do?
They decided to ______.
Apart from the professional and academic discussions, the obvious characteristics of a workshop __ its emphasis on practical performance.
What is the accurate statement about the pull of the sun on the earth?
To our surprise, he behaved _________(装作若无其事的样子).