Speculation about the past, present, future B1-5

In the future, people _____ live only on Earth. They could live on lots of different planets.

• might not

• couldn't

The wheel might have been invented in Poland, but it ____ have been invented in Iraq.

• could

• can

I have to run in a 10 km race today, so I ____ l be tired tomorrow. I ____ have much energy for our tennis game.

• must / can't

• will / won't

He ____ be very happy about his great exam results. He's really happy. I bet he ____ have studied hard for them!

• can't/can

• must/must

They ____ still be shopping – the stores closed an hour ago. But they might be waiting for a bus.

• could

• might

• can't

• must

She ____ feel terrible about dropping the vase. She ____ have been holding it properly.

• must/can't

• can/must

I ____ have been waiting for him for more than an hour, because I watched a whole movie on my cell phone while I was there – I don’t know why he never turned up.

• could

• can't

• might

• must

She _____ be playing in the match tomorrow because she’s broken her arm. It ____ have been a bad accident because she broke it in three places.

• couldn't/will

• won't/must