Here are the correct options for each question:

**69.** Why are some fishermen unlucky?
- **C. Because they catch a lot of fish.**

**70.** What does the writer catch after having spent whole mornings on the river?
- **D. He catches a lot of fish.**

**71.** What do his friends say?
- **D. Both B and C.**

**72.** What is he only interested in?
- **C. I am only interested in fishing.**

For the passage from 73 to 80:

**73.** Minh is **(73)**
- **A. a**

**74.** Everyday he **(74)**
- **B. walks**

**75.** because he **(75)**
- **A. by**

**76.** near school. He likes **(76)**
- **C. the**

**77.** English very much and,
- **A. learns**

**78.** very good **(78)**
- **B. at**

**79.** He spends at least **(79)**
- **D. with**

**80.** hour **(80)**
- **A. to**

These selections complete the passage correctly based on standard English usage.