1.   Heat makes the gas in the container expand.

2.   I went off so often Frank began to notice and I said the heat made me restless.

3.   The heat made him feel quite faint.

4.   The heat was making me listless.

5.   The heat was making them tired.

6.   The heat was making us all uncomfortable.

7.   Too much heat will make the custard curdle.

8.   The heat made everyone tired and listless.