The meter.
kilograms
cups
That depends what aspect of the car you want to measure: for example its length, volume, mass, weight, color, etc.
Probably the most suitable unit of measurement.
kilometers
appropriate unit to measure the width of a textbook = ce ntimeters
The answer depends on what you wish to measure: its length (or width or height), its mass, it fuel efficiency, it maximum speed, its maximum acceleration, its tightest turning circle, its power output, its drag, etc.
length would be about 1dm, but dms are not used. centimetres would be more mainstream to use
An appropriate metric unit for the mass of an eyelash would be milligrams (mg) because eyelashes are extremely light and measure in the milligram range.
foot is the most precise way to measure any unit
The standard unit to measure mass is kilograms.
The most common unit to measure the length of a slice of pizza is inches.
Kilometres. Except that many Americans would probably not understand those units.
The most suitable units to measure the height of a person are, feet and inches.
feet
Centimetre.