15.
Read the text below. For each empty space (1-6) choose the correct answer (А, В, C or D).
Planet Earth is a ball of rock and metal, (1) up of four layers. The thin, cool, out¬side layer (2) the crust. People live on the surface of the crust. The three layers inside (3) and (4) than the crust. No one (5) exactly what earth is like deep inside, but we do know that (6) part is in the middle.
A В C D
1 made make making was made
2 called calling calls is called
3 is thicker are thicker is thickest are thickest
4 more hotter much hot much hotter more hot
5 knows know is known known
6 hotter hot the hotter the hot
