As a 'correct' answer is given: "They sometimes prep in the morning" - Why "prep"? 'Sometimes' can be used on several places in the sentence - "Sometimes they study in the morning", "They sometimes study in the morning" or (as mentioned by 'Mstanding') "They study sometimes in the morning".
I totally agree with the former posts. the female voice is terrible. It may be common for day to day speech but we are trying to lesrn the language. It is exteremely /sometimes impossible for me to distinguish the o's from the a's in her speech. I too have no problems wi the male voice. As well, she runs words together so rapidly that many of the articles can't be heard. they need to get a different female voice ,or get her some dictio lessons.