________ people used the computer thirty years ago, but now it’s very popular.

---Mum, I hurt my leg when I climbed the tree. --- You ___ that tall tree. I’ve told you many times.

—Hi，Joan.Any idea where Tom is?—He ________ on the playground.I saw him there playing football just now.

“Passengers _____ not have their breakfast on the light train”. This rule arouses heated debates in Chongqing.

Susan’s parents have bought a large house with a swimming pool.It      be very expensive.