Say what these things are usually or often made of. Example: Matryoshka dolls are usually made of wood.

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More valves per cylinder

2 more valves per cylinder. The more valves there are, the better the combustion of fuel and, as a result, the power and torque at high speeds increase due to better filling and exhaust gas discharge

Better compression ratio

By 28% or 3.3, the greater the compression ratio, the less fuel is needed to get the same power

More engine power

By 90% or 695 hp. The higher the power of the car, the higher the maximum speed. Do not forget that the increase in horses increases the transport tax!

1.

1 was

2 was having/ went

3 was eating/ rang

4was taking

5 was having/ gave

6 met

7 was watering/ started

8 was eating/drank

2.

1) Mother was watching TV when he arrived.

2) Tom was playing computer games at 9PM yesterday.

3) Bob and Mark were reading magazines when their father came.

4) She was sending e-mails until 10PM last night.

5) His father was recovering in hospital for three weeks after his fall.

3.

1) They were doing the homework when their father came.

2) His parents were reading while Tom was sleeping.

3) When Ann was watching TV, he was dancing.

4) Mother was cooking dinner when Kate heard a noise.

5) John was reading a magazine when the film started.