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21.What is the purpose of the contribution?Ae those with mental diseases.

A.To employ some financial planners.

B.To collect some volunteer doctors.nn

D.To develop the resources and contents.

22.What do we know about the process of making a contribution?

A.Different approaches of payment are ready.

B The contribution is made on a voluntary basis.

C.Only readers are accessible to the contribution.

D.The contribution is part of a charitable donation.