About eight o'clock?的用法和样例：
- We usually put the children robed about eight o'clock.
- "Why, hello, Charlie, old man," said Hurstwood, as Drouet came in that evening about eight o'clock.
- The sea declivity was so small, that I walked near a mile before I got to the shore, which I conjectured was about eight o'clock in the evening.
- Seeing that it is eight o'clock, we'll wait no longer.