_________(61)A.reason B.chance C.opportunity D.fa

1，－5，13，－29，______ A.－61 B.－39 C.39 D.61

61._________A. processesB. producesC. possessesD.

61._________A. enjoyedB. experiencedC. performedD

Paragraph 2________A.Reason Why Not Many Scientis

Paragraph 3________A.Reason Why Not Many Scientis

Paragraph 4________A.Reason Why Not Many Scientis