There was a________look on his face when he met with the________problem.
8. The old building possibly the Ming Period.
7. In a word, I don’t think what you said at all.
6. He is quite sure that it’s impossible for him to finish the task within two days.
5. China has made great progress in the sun’s rays as a source of energy.
4. Have you heard of the town when they built the dam?