【简答题】Passengers always take notice of the safety record.
【简答题】改错 : China has a four-tier (层,等级) color-coded warning system for severe weather, with red the most serious, following by orange, yellow and blue.
【简答题】When an offer has reached the offeree, the offeror can no longer ______ it.
【多选题】China has four most famous types of embroidery—respectively from Suzhou, ______, ______, and _______—each with its own style and different themes.