[ Vocabulary ]
Earthquake waves travel slowly through the hotter parts of the ______ and speed up in colder, denser areas.
A. kinetics
B. mantle
C. lipids
D. latitude
Select your answer:

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Grammar › ViewA ratio Is a comparison of – – – – – whole or a part to another part.
(A) part to the
(B) a part to
(C) a part to the
(D) the part to the
Grammar › View
I study hard _________ I can pass the exam.
A. for
B. to
C. so that
