All animals grow and change before they become adults. The way an animal grows and changes is 40 its life cycle. In fact, not all animals 41 their parents when they are very young. For example, before a butterfly 42 an adult, it goes through some very big changes. After each change, it starts a new stage, or part, of its life. There are four main stages in a butterfly’s life. They are egg, caterpillar, pupa (蛹), and adult. First, a female butterfly lays eggs. Then a caterpillar 43 from an egg. 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 44 their mates. The female butterflies will lay eggs, and the life cycle will begin again.
【題組】44. (A)are found (B)are finding (C)have found (D)will find