43.
(A)gives
(B)hatches
(C)offers
(D)produces

First, a female butterfly lays eggs. Then a caterpillar hatches from an egg.

→首先，雌性蝴蝶產卵。 然後，一隻毛毛蟲從一個蛋孵出來。

 It begins to eat and grow. Later, the caterpillar gets rid of its skin and becomes a pupa. When the adult butterfly has formed, it is ready to come out. Some butterflies live for as long as eighteen months. But some live for only two weeks. During that time, most butterflies _____9_____ their mates. The female butterflies will lay eggs, and the life cycle will begin again.