[ Present Perfect Simple ]
Juan Martin Del Potro has played tennis
A. the age of three
B. since the age of three
C. for the age of three

Random Topics:
Sentence Structure and Verb TensesTenses and QuestionsCompound AdjectivesPronounsRelative ClausesFuture Time and TensesModalVerb & GrammarTransitionsSimple Present Tense with Adverb of FrequencyOther quiz:
Grammar › ViewThe astronaut who first walked on the Moon was Neil Armstrong.
A. essential
B. nonessential
Grammar › View
The paper ___ discussed when I called the office this morning
A. Was being
B. Been
C. Being
D. Have been
Vocabulary › ViewIn Virginia, many students visit the city of Williamsburg where they can watch shows and learn what it was like to live during the ___________________ times when the United States of America was still under British rule (the years of 1607-1776).
A. memorial
B. restless
C. colonial
Grammar › View
What is the predicate of this sentence?: The little puppy barked all night long downstairs.
A. The little puppy
B. downstairs
C. barked all night long
