Hello. I'll really appreciate it if you help me with a few questions.

1)Is the article used in the context "I am late for the (?) class"?
2) What is a natural way to ask a question the answer to which will be "twenty minutes, I am 20 minutes late for work." Maybe, "How much time are you late?" (it sounds strange to me.)
3) Do you think the following questions are OK?
a)What are you agry with your sister about (over)?
b) About (over) what are you angry with your sister?
Thank you for your answers a lot.

Question 1 is fine, but could be "my (blank) class."

Question 2: Yes, your question does sound awkward. It might be, "How late for work are you?"
Question 3: About is better than over.

Hello! I would be happy to help you with your questions. Here are the answers:

1) In the sentence "I am late for the (?) class," the correct article to use would depend on whether "class" is countable or uncountable. If "class" refers to a specific class, you would use the definite article "the." For example, "I am late for the biology class." If "class" refers to a general class or class in a broader sense, you would use the indefinite article "a." For example, "I am late for a class." It all depends on the specific context you are referring to.

2) If you are asking about the amount of time someone is late, a more natural way to phrase the question could be, "How long have you been late for work?" or "By how much time are you late for work?" These phrases convey the idea of asking about the duration or length of time someone is late.

3) Let's look at each question individually:

a) "What are you angry with your sister about (over)?" - This question is generally fine grammatically. However, you might consider using either "about" or "over," but not both together. So you could say, "What are you angry with your sister about?" or "What are you angry with your sister over?"

b) "About (over) what are you angry with your sister?" - This question is grammatically correct, but it may sound slightly formal or awkward to some native speakers. A more common and natural way to phrase this question might be, "What are you angry with your sister about?" or "What is the reason you are angry with your sister?"

Remember that language can be flexible, and expressions may vary depending on region and personal style. I hope these explanations help. Let me know if you have any further questions!