The quality of the phone signals has been improved through ___ developments in digital technologies.
A.reluctant
B.recent
C.remaining
D.ready

Have I ___ to you how to use this new typewriter?
A.answered
B.explained
C.told
D.showed

Don’t worry. I have ___ tire at the back of my car.
A.another
B.other
C.others
D.the other

How many times are children who are older than 10 required to go to school weekly?
A.No time
B.Once or twice
C.Three
D.Four

The author mentions the sources of energy such as wind, steam, petrol in the first paragraph to ___.
A.suggest that electricity should be alternated with safer sources of energy
B.emphasize the usefulness and adaptability of electricity
C.imply that electricity is not the only useful source of energy
D.discuss which source of energy can be a suitable alternative to electricity

What does the author mean by saying that electricity is flexible?
A.It is cheap and easy to use.
B.It is used to drive motor engines.
C.It can be adapted to various uses.
D.It can be made with ease.

What do we call machines that make electricity?
A.voltages
B.electric magnets
C.generators or turbines
D.pipes and radiators

The word they in the last paragraph refers to ___.
A.harmful effects
B.the tides
C.scientists
D.new ways

The best title for this passage could be ___.
A.Types of Power Plants
B.Electricity: Harmful Effects on Our Life
C.How to Produce Electricity
D.Why Electricity Is So Remarkable

Team work or pair work is a good way to ___ student talking time.
A.minimize
B.maximize
C.rise
D.grow