_____ IS NOT CLEAR TO RESEARCHERS

Question

Câu 17 (VD):_____ is not clear to researchers.A.Did dinosaurs become extinct B.Why dinosaurs having become extinctC.Dinosaurs became extinct D.Why dinosaurs became extinct

Accepted Answer

1-D 2-D 3-B 4-D 5-D 6-C 7-B 8-C 9-B 10-A 11-B 12-A 13-A 14-B 15-B 16-B 17-D 18-C 19-A 20-D 21-C 22-D 23-B 24-A 25-C 26-A 27-B 28-D 29-B 30-C 31-B 32-A 33-B 34-C 35-B 36-D 37-C 38-A 39-C 40-A 41-C 42-....

_____ IS NOT CLEAR TO RESEARCHERS

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