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691.Leonardo da Vinci ____ birds kept in cages in order to have the pleasure of setting them free.
A.is said to be buying
B.is said to have bought
C.had said to buy
D.has said to have bought
692.Come on,please give me some ideas about the project.
Sorry.With so much work _______ my mind,I almost break down.
A.filled
B.filling
C.to fill
D.being filled
