[ Vocabulary ]
A rule that describes, but does not explain, a pattern in nature and predicts what will happen under specific conditions.
A. rarefaction
B. scientific law
C. observation
D. experiment
E. theory

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Passive Voice - Present TensesGrammar : Structural Common ErrorsDistinguishing Future TensesNoun PhraseReflexive Pronouns & Modal VerbsPerfect and Past TensesSo Such Enough TooTenses - Irregular VerbsTime ExpressionsRelative ClauseOther quiz:
Conjunctions › ViewYou should call him ___ send him an email.
A. and
B. but
C. or
D. because
Prepositions › View
Boxing day is __________ the 21st of December.
A. in
B. on
C. at
D. under