=> 1. This is the first time I have had to wait this long for a bus. 2. Remember to put down what the tour guide said. 3. We spent 3 hours discovering the inner Hanoi. 4. Dickens' "David Copperfield" is the most popular book. 5. Why don't you think over our suggestion before making official decision? 6. Doing homework is more important than watching TV. 7. My friend is a brilliant pianist. 8. I feel so bored with most of the young men of my own age.