[ Vocabulary and Grammar ]
__________ any apps before they made this one?
A. Did they designed
B. Had they designed

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Question tag and + - AgreementBecause / soSimple PastCommunicative GrammarWho am I?Compound and Complex, ConditionalsModal and Phrasal VerbsIdentifying Sentence TypesPresent Perfect vs Past SimpleComparative Adjectives and AdverbsOther quiz:
Grammar › ViewCombine the sentences with a compound subject.
A. Lions and Giraffes live in savannas.
B. Lions and giraffes live in savannas.
C. Lions live in savannas and Giraffes live in savannas.
Verb Tenses › View
Which of the following sentences is in the present perfect tense?
A. I will read that book.
B. I read that book.
C. I have read that book.
D. I am reading that book.