Modal Perfect for Deduction (must have, can't have, might have) — Bài Tập 3

The two documents, written a century apart, used an identical, obscure phrase. The second author ___ read the first author's work. It's too specific to be a coincidence.

The window is broken. A bird ___ flown into it.

The room is a mess. The children ___ been playing here.

I thought I saw a light in the abandoned house, but it was probably just a reflection. It ___ been someone inside.

He's a terrible singer. He ___ won the singing competition.

The ancient civilization vanished without a trace. They ___ faced a catastrophic event they couldn't survive.

The cat is sleeping by the empty food bowl. It ___ eaten all its food.

She has a tan. She ___ been on holiday.

The code works perfectly now. There ___ been a simple typo in the original version.

The ancient script was finally deciphered. The linguist who worked on it ___ been thrilled.