Mr. Lin: Welcome to my insect corner. Let me show you around. Look, here are some butterflies. Do you know how they grow? First, they (are/ were) small eggs. Then they, became green caterpillars. The caterpillars (ate/ eat) leaves. After two weeks, they became (become过去式) brown cocoons. Now they (are/ were) colourful butterflies.

Jane: Amazing (令人惊奇的)! Oh, I (seeing/ see) some ladybirds over there.

Mr lin: Yes, I (have/ having) five ladybirds. This one is my favourite. It has seven spots (斑点)! It (was/ were) a birthday present from my friend.

Jane: It's beautiful!