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busy not busy no busy busier
to stop stopping to have stopped having stopped
to stop stopping to have stopped having stopped
to stop stopping to have stopped having stopped
to stop stopping to have stopped having stopped
to stop stopping to have stopped having stopped
to stop stopping to have stopping having stopped
to stop stopped having stopped stopping
is occupied occupies is occupying is busy
to have to having have having
is occupied occupies is occupying is busy
to expect to have expected expecting having expected
stopping to stop stopped having stopped
to have to having have having
to stop stopping to have stopped having stopped
Despite of In spite of Thanks to Even though
There is a bird sing in the treE. There is a bird to sing in the treE. There is a bird singing in the treE. There is a bird is singing in the treE.2.—What are you going to do?—Nothing much. Why?A. I’m busy. B. I’m OK. C. I’m right. D. I’m freE.3.With his aunt’s help, the little boy can go on with his study. A. Thanks to B. Under C. Thanks for D. Over4.Jack is having a day off. A. working a whole day B. having a rest C. away from work for a day D. having a meeting5.I am free on any day except weekend next week.A. Saturday or Sunday B. every dayC. Monday to Friday D. Monday or Friday