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1. Are you around?
2. Are you available?
3. Are you online?
4. Are you present?
5. Can you hear me?
6. Are you still there?
7. Are you with me?
8. Are you listening?
9. Is anyone there?
10. Do you copy?

Shoud/ should not/ some/ any

Countable and uncountable nouns - Must/ mustn't

Comparative adjectives

Present simple or continuous

Prsesent continuous