The world’s first airplane passenger service ___ at Atlantic City on May 3, 1919.
Independent vs. Subordinate Clause Come vs. GoPresent Perfect TensePresent Continuous TenseCountable & Noncountable NounsVocabulary & GrammarHave vs. HasIntermediate PrepositionsConditional
Other quiz: Grammar
What’s he doing?
A. He play tennis
B. He’s playing tennis
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