It is reported that between the year 1550 and 1950 about one kind of living things___each year .
It’s unfair that he _________ cheating because he’s a famous author.
—Good morning. Can I help you? —I’d like to have this package ________.
—Do you rememberhe came? —Yes, of course. He came by train.
Although my parents are very busy, they still ______ a lot of time to us.
Remember ______ the book when you have finished it.