Please select a word to replace the underlined one. Doing homework is important, but it’s not always enough.

Please select an expression to replace the underlined one.The first chapter sets out to explain the origins of modern science.( ) A: intended（此处可用 is intended） B: aims C: is meant D: supposed （此处可用 is supposed） E: intends（此处可用 is intended）

Please select a word to replace the underlined one. He is so captivating. A: attractive B: charming C: fascinating D: alluring

Please select a word to replace the underlined one. What they found out is so important that the university decided to make changes to its polices.

Which one is the appropriate expression to replace “I think”?