大多数鸟类在春天产卵。

Most birds ___lay ___eggs in the spring.

雌性海龟会回到它们出生的海滩产卵。

Female sea turtles return to the beach where they were born to ___lay ___eggs.

这种昆虫把卵产在树叶的背面。

The insect ___lays its ___eggs on the underside of leaves.