A
Two firefighters 1 (wait) in line at a fast-food restaurant when the siren (警报器) sounded on their fire engine outside. As they turned to leave, a couple who 2 (receive) their order a moment ago handed their food to the firefighters. The couple then got back in line to reorder. 3 (appreciate) their selfless act as a reward, the manager refused to take the couple’s money.
B
Have you ever thought about having another finger? Researchers at University College London have developed a robotic 3D-printed “third thumb”. The thumb is worn on the side of the hand opposite the actual thumb. Volunteers 4 (wear) the third thumb could carry 5 (many) objects than usual, and hold and open a soft drink bottle with one hand. Also, human brains can adapt to the use of an extra thumb 6 (easy).
C
Lanzhou, 9th August 2017. A group of scientists from different 7 (country) were working together to help increase knowledge and appreciation of China’s ancient cultural heritage. They were recording and collecting digital images of cultural relics from the Mogao Caves 8 had been a key stop along the Silk Road throughout China’s ancient history. Nearly 500,000 high-quality digital photographs 9 (produce) since the international project started in 1994. By sharing so many digital photos 10 the Internet, the group hopes to promote even wider interest around the world.