语法填空
Extending south from parts of what we now know as Mexico into Central America, Maya civilisation 1 (surround) by mystery since its rediscovery in the 19th century. The Maya built 2 (impress) palaces and temples. 3 is most extraordinary about these complex structures is how they were built without the use of wheels, metal tools or even animal power. The Maya people applied their understanding of mathematics and astronomy 4 the Maya calendar, which was accurate to within 30 seconds per year. On top of all this was an achievement unique in the Americas at that time—a true writing system, which contained more than 800 characters, with some signs 5 (represent) syllables. It was a writing system so complicated that, so far, no one has been able to interpret it 6 (complete).
By 700 AD, Maya civilisation was at its peak. Yet, within a couple of 7 (generation), it began to mysteriously decline. The cities were left to be taken back by the jungle. Some research seems 8 (indicate) that the Maya people 9 (they) may have played a part in their downfall. Research also suggests that those natural disasters may have led to the decline of the Maya. 10 the reasons are, Maya civilisation largely disappeared within the deep jungle.