I listened to Dr.Wilson’s lecture about the protection of wild animals,but I was unable to grasp its key _________.

As a result of destroying the forest, a large ________ of desert ________ covered the land.

---Oh, you’ve got this English-Chinese dictionary. How do you find it? ----It is ______. I turn to it whenever I meet with new words.

Young people use more Web language in their conversations, such as “Geili” because such language gives them a sense of ________.

I think it is a top priority for the government to furnish the children with ___to the information superhighway.