Desert Formation and The Origin of Cetaceans

Here are the answers of the Reading Comprehension training exercices ("Desert Formation" and "The Origin of Cetaceans"):

Desert Formation

1 B / 2 B / 3 A / 4 A / 5 D/ 6 C / 7 D / 8 D / 9 C / 10 A / 11 C / 12 B / 13 A C D

The Origin of Cetaceans

1 B / 2 A / 3 C / 4 C / 5 A / 6 B / 7 D / 8 D / 9 B / 10 C / 11 D / 12 B / 13 A B E