- You talk so much about London. You ________have been there. - Yeah, I went sightseeing on a tour last summer.

—Have you checked the engine? —Yes, I did twice; there ______ be anything wrong with the car.

–I’ve taken someone else’s green sweater by mistake.–It       Harry’s. He always wears green.

 ---- Have you ________ Tim to go with us'? ---- No. He wants to but he ________ care for his sister because his parents are busy.

—Look at the sign! —Oh, I see.We _______ waste water.