Надо изменить форму в скобках.
Long ago, artists __(to make) the
camera obscura. The camera obscura ___ (to be) a smaill. dark room with a
hole in one wall. In this room light ___ (to go) throuhg the hole and a
picture ___ (to appear) on the wall opposite the hole.
2) Nowadays, when we ___ (to press) the button on top of a midern camera, the shutter ___ (to open). Thhe light __ (to go) through the lens and the film ___ (to record) the picture.