Here are the corrections for each sentence:

1. "She visits Ha Long Bay **when** she was a child."
- Correct answer: **A. when** (It should be "when she was a child," indicating a past tense; it can be changed to "visited.")

2. "I **love** outdoors with a lot of trees and flowers."
- Correct answer: **C. love** (It could be corrected to "I love being outdoors" or "I love the outdoors.")

You should circle **A** for the first sentence and **C** for the second sentence.