Find a mistake in the four underlined parts of the sentence and correct it:
Electricity is the most critical energy for the future of many countries and cheap, plentiful electricity is associated for high employment and productivity.
A. the most
B. plentiful
C. for
D. and productivity

Find a mistake in the four underlined parts of the sentence and correct it:
If you slept under a mosquito net you weren’t bitten so often.
A. slept
B. mosquito net
C. weren’t
D. so often

Find a mistake in the four underlined parts of the sentence and correct it:
In the future smart cars will also be intelligent enough to avoid pedestrians, bicycle riders and others whom are not driving automobiles.
A. also
B. enough
C. bicycle riders
D. whom

Find a mistake in the four underlined parts of the sentence and correct it:
When he was telling them what had happened, they thought he was madder still.
A. was telling
B. had happened
C. thought
D. madder still

Find a mistake in the four underlined parts of the sentence and correct it:
A ball eagle can distinguish from other large birds by its white head and white tail.
A. A ball
B. can distinguish
C. other
D. its

Find a mistake in the four underlined parts of the sentence and correct it:
Trees are designed as neither hardwoods or softwoods.
A. are
B. as
C. neither
D. or

Find a mistake in the four underlined parts of the sentence and correct it:
Disease, pollute, and limited distribution are factors that threaten various plant and animal species.
A. pollute
B. are
C. factors
D. threaten

Find a mistake in the four underlined parts of the sentence and correct it:
He asked me if I had gone out last night or I had been tired.
A. asked
B. had gone
C. last night
D. had been

Find a mistake in the four underlined parts of the sentence and correct it:
I have a problem to memorizing names of people.
A. have
B. problem to
C. memorizing
D. names

Find a mistake in the four underlined parts of the sentence and correct it:
The mountain climbers were warned for the avalanche danger.
A. mountain
B. were
C. for
D. danger