Unless ____ to speak, you should remain silent at the conference.A invited B inviting C being invited D having invited
---What do you think _____ an important part in their daily lives? ---Music.
He seems to be doing nothing, but _____ he is just waiting for his chance.
The boss requested that he _____ there to work.
You must ______ your papers before you hand them in.
Did you have any difficulty _____ his house?