Unit 1 vocab & grammar lessons 1-3

He is wearing a sweater. It (must / may / could) be cold outside.

The ghost story was so __________ that everyone had chills.

The plane seemed to ______ into thin air while flying over the Bermuda Triangle.

A solar eclipse is a natural __________ that people around the world stop to watch.

The boy is crying. He (must/might/can't) have had a bad day.

The hiker’s sudden ___________ in the mountains remains unexplained.

They didn’t answer the phone. They (may / can’t / must) have been busy.

The magician’s trick continued to _____ the audience; they couldn’t figure out how it worked.

The lights are on in the classroom. The teacher (must / can’t / might) be inside.

He seemed normal at first, but his _______ behavior worried his friends.

That story sounds strange. It (can’t / must / might) be true.