[ Tenses ]
When he _______________ all the letters, he took them to the post office.
A. has written
B. had written
C. wrote
D. had been writing

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Adjective / Noun + to InfinitiveModals in the PastVerb PhrasesPresent Simple/AffirmativePast PerfectQuantifiers: too many, too much & enoughPast and Present Continuous tenseRequest with Modal VerbsFuture - Will and Be going to-ed/-ing AdjectivesOther quiz:
Grammar › ViewWhich kind of word are these
A. Prepositions
B. Intensifiers
C. Adjectives
D. Articles
Abstract Nouns › View
What is the abstract noun in the sentence: His dedication to the cause is commendable.
A. dedication
B. cause
C. commendable
D. his