7. Why do scientists think that the channels of Mars were waterways?(A) Bones have been found there.(B) They still have a little water in them.(C) They resemble a similar system on Earth.(D) They are straight and narrow.8. According to the passage, Pathfinder's mission to Mars includes(A) preparing for future fossil-finding expeditions(B) placing specialized equipment on the planet's surface(C) checking for flood damage(D) bringing back fossils for further studyKunci Jawaban1.B, 2.D, 3.A, 4.B, 5.D, 6.B, 7.C, 8.D
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