Sentence 51:
Original: If you want to do a lot of progress, you need to try harder.
Corrected: If you want to make a lot of progress, you need to try harder.
Explanation: "Make progress" is a common phrase used to express improvement or advancement.
Sentence 52:
Original: Some people often say that using cars is not so convenient than using motorbikes.
Corrected: Some people often say that using cars is not as convenient as using motorbikes.
Explanation: To compare two things using "not as... as," we use this structure.
Sentence 53:
Original: Dr. Harder, that is the professor for this class, will be absent this week because of illness.
Corrected: Dr. Harder, who is the professor for this class, will be absent this week because of illness.
Explanation: We use a relative clause "who is" to provide additional information about Dr. Harder.
Sentence 54:
Original: Because the student spent too many time surfing the Internet, he didn't study well.
Corrected: Because the student spent too much time surfing the Internet, he didn't study well.
Explanation: "Too much" is used to modify uncountable nouns like "time".
Sentence 55:
Original: Many people object to use physical punishment in dealing with discipline problems at school.
Corrected: Many people object to using physical punishment in dealing with discipline problems at school.
Explanation: We use the gerund "using" after the preposition "to".
Sentence 56:
Original: The effects of cigarette smoking has been proven to be extremely harmful.
Corrected: The effects of cigarette smoking have been proven to be extremely harmful.
Explanation: The subject "The effects of cigarette smoking" is plural, so the verb should be plural as well.
Sentence 57:
Original: I try hardly but I can never catch up with him because he is so smart.
Corrected: I try hard but I can never catch up with him because he is so smart.
Explanation: "Try hard" is a common phrase to express effort.
Sentence 58:
Original: Labor Day is always celebrated on first Monday in September.
Corrected: Labor Day is always celebrated on the first Monday in September.
Explanation: We use the definite article "the" to specify a particular Monday.
Sentence 59:
Original: Japan is the country where occurs the most earthquakes in the world.
Corrected: Japan is the country where the most earthquakes occur in the world.
Explanation: We use a relative clause to describe Japan. The relative clause should be in the active voice.
Sentence 60:
Original: My father asked my elder brother to give off smoking because of his health.
Corrected: My father asked my elder brother to give up smoking because of his health.