Why don’t you explain_______
A.you for some money?
B.it to her?
C.with your results?
D.of not having any free time?

Choose A, B, C, or D that best completes the sentence.
We find it ____ to do housework.
A.bore
B.bored
C.boring
D.boringly

A clean, safe form of energy which comes from the sun is...............
A.lunar energy
B.solar energy
C.fossil fuel
D.tidal energy

Because it is thinly spread, solar energy is still difficult and................. to collect.
A.cheap
B.expensive
C.ready
D.inexpensive

Choose A, B, C, or D that best completes the sentence.
The fire-prevention system is ____ by any small increase in temperature.
A.active
B.activated
C.acted
D.acting

Choose A, B, C, or D that best completes the sentence.
A laser beam consists of a ____ of pure light.
A.concentrate
B.concentration
C.concentrative
D.concentrating

Choose A, B, C, or D that best completes the sentence.
To ____ in a job interview, you should arrive on time, be well-dressed, and keep ____ when answering the questions.
A.successfully /calm
B.successful /calmness
C.success /calmly
D.succeed /calm

Choose A, B, C, or D that best completes the sentence.
The practice of ____ is also known as farming.
A.agriculture
B.agricultural
C.agriculturally
D.agriculturalist

Choose A, B, C, or D that best completes the sentence.
A (an) ____ home environment can affect a child’s ____ .
A.happiness / behavioral
B.happy / behave
C.unhappiness / behave
D.unhappy / behavior

Choose A, B, C, or D that best completes the sentence.
The geneticists have discovered the laws of ____ .
A.inherit
B.inheritance
C.inheritor
D.inheritable