汽车冲下山坡并燃起大火。

The car plunged down a hill and ___burst ___into ___flames.

当我们打开旧取暖器时，它突然着火了。

When we turned on the old heater, it ___burst ___into ___flames.

干旱时期，干燥的森林可能因一点火星就突然燃烧起来。

In the drought, the dry forest can ___burst ___into ___flames from a single spark.