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—Will you go to Mary’s birthday party?
—No, ____ invited, I can’t go to it because I’ll be too busy then.

He was so pleased with all _____ we had done for him _____ he wrote us a letter to praise us for it.

Today’s teens don’t see anything strange in the fact _______the computer takes up a central place in their social lives.

All 5 children of the Blacks, _______ are now working abroad, will come back for their parents’ 50^th wedding anniversary.

We live in a society _______ there is a great deal of debate about competition.

Every time ______ they met, they would talk several hours together about the persons and things _______ they remembered in the middle school.

— ____ visited the Shanghai World Expo is sure to tell you the place is worthy ____ twice．
— You can say that again．

With your help, there is no doubt ______ our plan is meant for will work out successfully.

The data shows ________ successful people have in common is ________ they have perseverance.

______, but the idea of having to work more than ten hours a day without weekends discouraged me.