learn
                    - It’s important _____. [ ]
 - You should learn English by using it.—What ____useful advice! Thank you very much.
 - Teenagers should learn to protect (保护) ______from all kinds of dangers.
 - _____ do you learn English? — By listening to tapes and reading aloud.
 - It’s not difficult to learn English well.
 - We can hardly believe that you learn to dance so ______.
 - The ______ the kids learn to look after themselves, the better it is for their future.
 - The _____ kids learn to be independent, the better it is for their future.
 - Which is ________ to learn, singing or dancing, baby?
 - Which is ______ to learn, fishing or swimming?