An e-pal, as you have known, means a friend ______ you write e-mails.

What does the fresh juice contain?— ________of the juice ________ orange. It’s very pure.

She started to work a teacher in India in 1929.[ ]

What does “three quarters” mean, Li Ping? —I see. It means __________.

Do you know nearly ________of our body is water?