In an internal combustion engine when air is 1) …, , it is heated. With high compression ratios (17 to 1), the air is heated enough to 2) … and 3) … an injected fuel. Burning causes higher 4) …. The additional heat of burning fuel increases 5) …, forcing the piston 6) …. This represents the 7) … … stroke, which delivers a twisting action (torque) to the 8) …. At BC, the 9) … valve opens. The piston then rises on the 10) … stroke, pushing the burned exhaust mixture from the cylinder. The intake valve opens when the piston is at TC, completing one full cycle.

1.Teacher wondered if a pupil knew the ABC.
Pupil replied that he knew it.
Teacher asked the pupil which letter went after "A".
Pupil answered that all the others went. 
2Tom told his Mum that Alice and he wanted to play.He explained that they were going to be monkeys at the Zoo that day.He told mother that she could help them a lot.
Mother asked him what she could do.
Tom replied that she could  be the woman who gave monkeys banans and sweets.
3.Pete said that he was very sorry but he had got a " two"in Maths that day.
Father asked him why he had got it.
Father wondered if Pete had understood the teacher's question.
Pete answered that he had.Pete explained that the teacher hadn`t understood his answer.