Here are the best answers along with explanations for each question:

1. **B. was**
- **Explanation:** The sentence refers to the past, indicating when someone was born, so "was" is the correct past tense.

2. **B. attacks**
- **Explanation:** The sentence is in the present tense and describes a habitual action (the enemy attacking by night), so "attacks" is the correct form.

3. **A. said**
- **Explanation:** This sentence refers to something that has already happened in the past, so "said" is the correct past tense form.

4. **A. hear**
- **Explanation:** The structure "Did you ever..." requires the base form of the verb, which is "hear."

5. **D. bought**
- **Explanation:** The sentence requires the past tense since it refers to a completed action (buying eggs), so "bought" is the correct form.

6. **C. was/ came**
- **Explanation:** The first part ("was") has to agree with "any eggs" which is considered singular in this context when asking whether any were present, while "came" is the correct past tense.

7. **D. join**
- **Explanation:** The sentence is in the present tense, and "not" should precede the base form of the verb "join" if negation is intended. Therefore, "I do not join" would be correct, but since this is about forming a complete thought, the affirmative "join" fits nominally.

8. **A. spoke**
- **Explanation:** The sentence talks about an action completed in the past. "Spoke" is the correct past tense of "speak."

9. **B. talked/ had**
- **Explanation:** The sentence requires both verbs to be in the past form, since it discusses actions that took place in the past. "Talked" and "had" are both past tense forms suitable for this context.

So, the answers in order are:
1. B
2. B
3. A
4. A
5. D
6. C
7. D
8. A
9. B