Which relative adverb best completes the sentence?
Do you know the reason _____ she is so upset?
A. when
B. where
C. why

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Offering HelpPresent Perfect vs Past SimpleVerb + Infinitive or GerundGrammar: was/wereGrammar and Sentence StructureArticles and PronounsSimple Present ProgressivePersuasive TextSubjective and Objective PronounAdverbs or AdjectivesOther quiz:
Infinitives and Gerunds › ViewShe enjoys ___ new recipes on weekends.
A. trying
B. to try
Conditional Sentences › View
The twins always wear the same clothes, making it hard to tell them apart.
A. If the twins dressed differently, it would be easier to distinguish them visually.
B. Without their similar clothing, it would be impossible to tell the twins apart
C. If the twins wore unique clothing, it would be difficult to tell them apart.
D. If they didn’t have such similar features, dressing differently would help distinguish the twins.
Grammar › ViewI understand gerunds and infinitives! I don’t need ______ the teacher about the grammar anymore.
A. to ask
B. asking
Simple Future Tense › View
Kind words … others joy.
A. would gave
B. will gave
C. will give