This remarkable technology provides far greater clarity than conventional x-ray.

单项选择题The author makes a lot of money.

单项选择题The author and the schoolchildren talk about the privacy of the boys.

单项选择题When it snowed, the kids expected to go home soon.

单项选择题On one Saturday afternoon, a man entered the shop to express his gratitude.

单项选择题A serious-looking man appreciate the author’s help by giving her a title.