[ 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

Random Topics:
Present Perfect, Present Simple, Present ContinuousToo or EnoughTravel VocabularyDegree of ComparisonPast Perfect TenseGrammar RulesWish clauseGrammar - Compound SentencesSimple Future Tensemust/shouldOther quiz:
Grammar › ViewI don’t mind ____ the dishes after dinner.
A. do
B. doing
C. does
D. did
Grammar › View
We had __ great time at the party last night!
A. such a
B. such
C. so
D. so a