giúp e vs ạ

Here are the answers with the correct verb forms: 1. When you **go** into the office, Mr John **is sitting** at the front desk. (Simple Present) (Alternative: When you **enter** into the office, Mr John **sits** at the front desk.) 2. Our English teacher **will explain** that lesson to us tomorrow. (Simple Future) 3. We **will be waiting** for you when you **get** back tomorrow. (Future Continuous and Simple Future) 4. What **will you be doing** at 7 p.m next Sunday? - I **will be practicing** my English lessons then. (Future Continuous) 5. When I **see** Mr Pike tomorrow, I **will remind** him of that. (Simple Future) 6. When you **came** today, I **was working** at my desk in Room 12. (Alternative: When you **come** today, I **will be working** at my desk in Room 12. However, this sentence is not grammatically correct since "when you come today" cannot be paired with "I was working.") 7. He **will be working** on the report at this time tomorrow. (Future Continuous) 8. Please wait here until the manager **returns**. (Simple Present) 9. Don't leave until you **see** her. (Simple Present) 10. The Browns **will be doing** their housework when you **come** next Sunday. (Future Continuous)