“Oh, how fat he is!” “But I think he is ____ than fat.”

 The loss of ability in the mother tongue is mainly caused by the         use of electronic devices and a lack of attention to culture.

—I wonder why Mary is so unfriendly to us. —She is ________ than unfriendly, I’m afraid. 

Just like fingerprints, each person’s DNA is ________unless he has a twin．

.In our school, there is a rule that anyone shouldn’t play computer games during the ______ working time.