Einstein’s Theory of Relativity is so________ that most of us can not understand it.
The children went home from the grammar school,their lessons ________ for the day.
—Come on,please give me some ideas about the project. —Sorry.With so much work ________ my mind,I almost break down.
John received an invitation to dinner,and with his work ________,he gladly accepted it.
________ as the “first lady of speech”,Dr, Lillian Glass is recognized as one of the world's leading experts on communication skills.
—Why do you look sad? —There are so many problems ________.