Sure, here are the correct answers underlined:

VI. Underline the correct answer.
1. Anthony's parents wanted him to become a teacher at first, but eventually he became a journalist.
2. By the time we reached/ **had reached** Frankfurt, my uncle was very tired of driving.
3. They had/ **had had** an argument just before I came/ **had come** into the room.
4. Camila didn't go/ **hadn't gone** to the opera house with us because she saw/ **had seen** that operatic performance twice.
5. Michael had a black eye. He looked/ **was looking** as if he was/ **had been** in a fight.
6. After they visit/ **had visited** the Tower, they went/ **were going** to Westminster Abbey.
7. Leah got/ **had got** to work this morning and realised that no one arrived/ **had arrived** yet.
8. Timmy and Alex asked/ **had asked** the zoologist which animals he raised/ **had raised** in Africa.
9. While we travelled/ **were travelling** to Hue, my sister fall/ **fell** ill and we had/ **had** to end our trip.
10. I was giving/ **gave** Mary directions to my house, but then I realised I forgot/ **had forgotten** to give her the exact address.

VII. Underline and correct the mistakes.
1. After Columbus discovered America, he **returned** to Spain.
2. By the time he flew to London, he **had visited** the UK three times.
3. The firefighters **had evacuated** the victims when the building collapsed.
4. Eleanor opened the locked door as soon as she **found** the key.
5. We weren't hungry because we **had had** some light snacks already.
6. They collected glass bottles, and then they **recycled** them.
7. I was cleaning the windows **when** the postal worker rang the doorbell.
8. They **had gone** for a sightseeing tour once the bus arrived.
9. When dad was mowing the lawn, mom was picking some roses. (No correction needed)
10. **Who composed** the Moonlight Sonata?

VIII. Write the correct form of the verbs in brackets using the present tenses or the past tenses.
1. How many Indian dishes **have** you **tried** (try) up to now?
2. At 7 a.m. yesterday, Mr. Smith **was not walking** (not walk) his dog in the park.
3. **Did** you **meet** (meet) the new members of our club last Wednesday?
4. My father is trying to give up smoking. He **has not smoked** (not smoke) a cigarette for three days.
5. **Had** the workers **removed** (remove) the rocks from the way before the cyclists continued racing?
6. James said he **had already seen** (already, see) that classic movie with his parents last week.
7. Ann and her sister **have read** (read) all of Shakespeare's plays. They love them all.
8. **Was** Gavin **flying** (fly) to Dallas to visit his aunt and cousin this time last week?