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Petrol and diesel engines are the two most common types of engines for land vehicles. Diesel engines are usually (1) __________________ (large) and (2) ________________ (heavy) than petrol engines. This make them (3) ___________________ (expensive) and unsuitable for cars as well as motorcycles. Cars and motorcycles use petrol engines because these engines are (4) _________________ (cheap) and they usually perform (5) _____________ (fast). 0n the other hand, diesel engines use (6) ________________ (little) fuel and last (7)______________ (long) than petrol engines.
Some land vehicles use electric—powered engines, due to advancements in technology. They are the (8)________________ (clean) and (9) ________________ (quiet) of the three types of engines. They are the (10) ___________________ (safe) because there is the (11) ______________________ (less) danger of these engines catching fire. Electric-powered engines are also the (12) _______________________________________ (environmental-friendly) of all the three engines.
PRACTICE 7
Read the comparison of the laptop, notebook and netbook. Circle the appropriate words or phrases in the brackets.
Portable computers were initially known as laptops. As the popularity of such computers increased, ultraportable laptops named notebooks were introduced. Every feature in laptops and notebooks (l) (is as important as/resembles/is the same as) those of desktop computers, (but/unlike/different from] laptops and notebooks are comparatively very light and
compact.
Netbooks are the
smaller version of
notebooks—netbooks do not
come with the DVD drive and
every other feature is
miniaturized in order to
reduce the weight and power usage. (2) (However/On the other hand/Although) there is no fixed specification for the size or weight, netbooks are generally recognized to be