Must / Can't para Dedução Lógica — Bài Tập 3

That ______ be John over there. He told me he was going to be out of the country all week.

The final report is full of complex scientific data and analysis. It ______ have been written by an expert in the field.

The puzzle piece is a square, but the hole is a circle. It ______ fit.

The philosophical argument contains a logical contradiction in its foundational premises. Therefore, the conclusion, regardless of how convincing it sounds, ______ be valid.

He won the lottery. He ______ be thrilled!

The archaeologist found Roman coins at a dig site in America. The coins ______ have been brought over much later.

He has a garage full of tools and builds furniture for fun. He ______ be good with his hands.

The recipe requires a cup of sugar, but I only have half a cup. I ______ be able to make the cake correctly.

Given the half-life of the radioactive isotope is 100 years, and the sample is 300 years old, it ______ have one-eighth of its original radioactivity.

A penguin is a bird, but it ______ fly.