It was clear that a chemical factory had ____ the pollution in the local rivers.

They are painting the school so lots of students are in temporary classrooms at the moment. It’s ____ a lot of trouble this week.

When I saw the painting, I was surprised. I didn’t know my dad ___ .

I’m cycling to the café so I’ll call you when I ___ there.

Matt ___ his driving test although he hadn’t had a lot of time to prepare for it.

A: I’m sure there were walnuts in this meal because I’ve had a mild allergic reaction to something. B: There ___ have been some in the cake we had for dessert because there were no nuts in any of the other dishes.

I had to go to the theatre because I ___ the tickets online.

Winning the award is probably the biggest ___ of my life!

A: I don’t want to audition for the play. I’m a terrible actor. B: Don’t say that. Anyway, they ___ give you a small part.

A: Look! Is that Andy? B: It ____ be Andy. He’s still on holiday in Croatia. I spoke to him last night.

We have devoted a lot of time and ___ to finding out our family history.

Josh has lost a lot of weight. He says it’s because he has ___ on the amount of bread he eats.

A: Someone wrote this in my book but I’m not sure who it was. It’s my name in Chinese. B: It ___ have been Pete because there’s nobody else here who speaks Chinese.