__________ earliest successful AI program was written in 1951 by Christopher Strachey, later director of the Programming Research Group at the University of Oxford.
A. A
B. An
C. The
D. That

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Grammar - Be going toGrammar - Verb Forms-ed/-ing AdjectivesComplex SentencesPresent Tenses and ConnectorsShould and Shouldn'tBasic TensesPast Tense vs Present Perfect TensePronoun Antecedent AgreementState Verbs and Action VerbsOther quiz:
Grammar and Sentence Structure › ViewAfter the concert ended, Aria, Ethan, and Abigail decided to head home. Can you spot the subordinating conjunction in this sentence?
A. We
B. Home
C. After
D. Ended
Grammar › View
Choose the correct statements FORMATION of WH question
A. Sub+ WH question+ verb+ object + Auxiliary verb + ?
B. HW Question + object + Auxiliary verbs + subject + verb + ?
C. Object + HW question + Auxiliary verb + subject + ?
Grammar › ViewMarcus said he…………………………(try) to find a flat for ages before he finally found one he liked.
A. tried
B. was trying
C. had been trying
D. has been trying
Tenses › View
Tim was tired. He _______ hard all day.
A. has been studying
B. studies
C. studied
D. had been studying
