10. The correct sentence should be:
Before her son attended (A) a 10-day (B) course in an army camp (C), he was a very shy (D) boy.
Correction: B → 10-day.

VII. Complete the conversation with the phrases or sentences in the box:

1. "Have you ever visited Niagara Falls?" - "Yes, twice. H. It's a truly awesome sight."
2. "How's your holiday going?" - "E. You're right. I found the camp so boring."
3. "Did you enjoy your summer camp?" - "G. Have a good time. They can't wait for the summer camp next week."
4. "Everyone looks eager for the summer holiday." - "A. Good idea."
5. "I think Toronto is the capital of Canada." - "C. That's not true. It's Ottawa."
6. "We're going on a trip to New York tomorrow." - "D. I will."
7. "Why don't we register for a summer camp?" - "F. Absolutely not!"