[已解决问题] NCE3 L54的一句话
During the summer, I noticed that the leaves of the tree were beginning to wither. Clusters of tiny insects called aphids were to be found on the underside of the leaves. They were visited by a large colony of ants which obtained a sort of honey from them.
请问为什么Clusters of tiny insects called aphids were to be found on the underside of the leaves. 用to be?
请问为什么Clusters of tiny insects called aphids were to be found on the underside of the leaves. 用to be?
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