... now looks almost exactly as it did in the early 19 th century In recent years, Hoi An has become a popular tourist destination in Vietnam In 199 9, it was certified by UNESCO as a World Cultural ... 197 3 a 75 tone space station called Skylab was launched by the USA Three crews of three astronauts were sent to Skylab, but at the end of 197 4, it was abandoned Skylab stayed in space until 197 9 ... excessive (adj) mức, nhiều abundantly (adv) cách dư thừa island (n) đảo explosion (n) vụ nổ gigantic (adj) to lớn, khổng lồ lava (n) dung nham, nham thạch TEST I Choose the most suitable word or...