1. Замени very many на a lot. Много писем - это a lot, ни в коем случае не very many. Who translates a lot of letters into English? What does he do with letters in English? How many letters does he translate into English? In what language does he translate a lot of letters?
2. Who gives us a lot of homework? What does the teacher do with the homework? Who does the teacher give a lot of homework? How much homework does the teacher give us? What does the teacher give us a lot?
3. Whose friends read a lot? Who reads a lot? What do your friends do a lot? How much do your friends read?
4. Telegrams - это письма? Если письма, то замени на letters. Если телеграммы - то оставь telegrams. Who gets a lot of telegrams every day? What does she do with a lot of telegrams every day? How many telegrams does she get every day? What does she get a lot every day? Hot often does she get a lot of telegrams?
5. Они работают слишком много? Если да, то they work too much. Who works too much? What do they do too much? How do they work?