Предложение с неопред. артиклем . язык со словом слон

There is an elephant in the zoo.

an elephant (существительное начинается на гласный звук, значит пишем an)
неопределённый артикль а употребляется с существительными, которые начинаются на согласный звук, например a table.

1. She nodded _a_ command to _the_ footman, and they drove off westward, down _the_ Strand, and so into _a_ little side street by __ Charing Cross. (Bennett) 2. I am going to Folkestone to-day, and shall stay at _the_ Metropole. (Bennett) 3. They were excited because they had been dining with _the_ editor of _The_ Times, and had been given _a_ glimpse of next day's paper. (Snow) 4. She sat in her superb private drawing room at _the_ Hotel Cecil. 5. _The_ boys loved him because he told them that _the_ Navy had borrowed him from _the_ U. S. Army just in time to blow taps on _the_ Maine as she was sinking, and he remained long after everyone including — captain had abandoned _the_ ship. (Wilson) 6. He began to walk very rapidly up towards __ Trafalgar Square. (Greene) 7. He went out and ate __ ices at a_ pastry-cook's shop in __ Charing Cross; tried _a_ new coat in __ Pall Mall; and called for __ Captain Cannon, played eleven games at __ billiards with _the_ captain, and returned to __ Russell Square. (Thackeray) 8. _The_ street was empty, unlighted save by _a_ reflection from __ Grandlieu Street behind them... (Faulkner) 9. In 1905 _a_ revolt broke out on _the_ Potemkin, one of _the_ battleships of _the_ Black Sea Fleet. 10. Yet, in — bright drawing room in __ Lord North Street, all he was thinking of... was what _The_ Telegraph, _The_ Guardian, the popular press, would say next day. (Snow)

1. After _a/the_ tour in _the_ Austrian Alps they had gone to _the_ Hotel Splendide at __ Montreux, in order to enjoy for _a_ day or two _the_ charms of __ Lake of __ Geneva. (Bennett) 2. Dusk was already falling on _ta/the_ noble curve of _the_ Thames. (Bennett) 3. I hear he's off to __ Central Africa. (Bennett) A. In Ivanhoe Walter Scott describes __ England of _the_ Middle Ages. 5. __ Capetown is in __ South Africa. 6. In _the_ heart of __ Central Asia lies __ Khoresm, _a_ small fertile area in _a_ sea of __ sand. 7. _The_ prospect ends... in little hills that come nearly to _the_ sea; rudiments, these, of _the_ Atlas Mountains. (Shaw) 8. "We've been touring _the_ world... We tried __ South America...We lasted three days in __ Australia..." "Have you ever been to. _the_ States?" (Amis) 9. Michael looked quizzically at his parent. Did he quite understand _the_ England of to-day? (Galsworthy)