[ Subject Verb Agreement ]
The number of chromosomes in a cell (varies / vary) from species to species.
A. varies
B. vary

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Relative Clauses beginning with PrepositionsModals and Comparative SuperlativeLinking VerbCorrelative conjunctionsModals and PhrasesGrammar: Simple Past and Past ContinuousModals and Past TensesOrdering AdjectivesPassive Voice, Question Tag, PrepositionsSimple Future TenseOther quiz:
Conjunctions › ViewTom is very friendly …. he is also a very good student.
A. and
B. but
C. so
D. because
Vocabulary › View
Quixotic means
A. noble but rash
B. sensible but unfair
C. sneaky