Writing:
Tom studies very hard
->Tom is
If was very cold, so we could hardly go out for a walk..
->Since
Mai will get good marks , but she has to work hard.
->If Mai
She wants thêm to sing a song.
->She suggests they
If you don't start working hard now, you won't be able to pass the final exam.
->Unless
We haven't been to the concert for over a year.
->The last time
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Sinh Học lớp 12
