Einstein’s Theory of Relativity was so __________that few people could understand it at that time.
The book is of great value. _______ can be enjoyed from it until you have a deepunderstanding of it, however.
The tutor(导师)asked his students to leave a wide ________ when typing their essays.
People like to shop in the supermarket because they are interested in the __________ of goods on offer and can buy whatever they want.
Many people complain of the rapid ________ of modern life.
She had a guilty________ about not telling the police what had actually happened.