Find a mistake in the four underlined parts of the sentence and correct it:
It takes some patients several months to get off this type of operation.
A. takes
B. several
C. get off
D. operation

Find a mistake in the four underlined parts of the sentence and correct it:
If you multiply any number from zero, the answer is always zero.
A. any
B. from
C. the
D. is always

Find a mistake in the four underlined parts of the sentence and correct it:
Habitat fragmentation have caused plant and animal species in the remaining islands of habitat to lose contact with others of their own kind.
A. fragmentation
B. have caused
C. species
D. with

Find a mistake in the four underlined parts of the sentence and correct it:
Many people are afraid that in the future there will be no space leaving for human beings and they express the idea of robots replacing human beings.
A. afraid
B. there will be
C. leaving
D. replacing

Find a mistake in the four underlined parts of the sentence and correct it:
The Europeans and Asians are completely different with each other.
A. The Europeans and Asians
B. completely
C. different with
D. each other

Find a mistake in the four underlined parts of the sentence and correct it:
We are working, that means that we are contributing goods and services to our society.
A. that
B. means
C. contributing
D. services to

Find a mistake in the four underlined parts of the sentence and correct it:
The people who they hadn’t seen the weather forecast were caught unaware by the
hurricane.
A. The
B. they
C. were
D. unaware

Choose the best answer for the following sentence:
Tom and Mary _________________ for Vietnam tomorrow.
A. leave           
B. are leaving                
C. leaving             
D. are left

Find a mistake in the four underlined parts of the sentence and correct it:
The term economic reform refers to policies directing by the government to achieve improvements in economic efficiency.
A. refers to
B. directing
C. to achieve
D. in

Find a mistake in the four underlined parts of the sentence and correct it:
Before Bob will leave for work this morning, he’s going to lock the door.
A. will leave
B. work
C. he’s
D. to lock