情态动词表推测的用法 — 英语词汇题

The Mars rover sent a clear signal at 8:00. Its antenna can send a signal only w…

Tom found a wet umbrella at the door. It ___ (not be) Lily's, because she went t…

Look! The rocket has just landed, and the astronaut is stepping out of it. He m_…

The lights are on, and I can hear music inside. Someone m___ be home.（一定�…

The animal has fins and lives in water. It ___ be a bird.

根据句意，用 have 或 has 加括号中动词的适当形式填空（过去…