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Đáp án: A
Dịch: Etna, trên đảo Sicily, là một ngọn núi lửa đang hoạt động.
1, most delicious
2, busier
3, smallest
4, more modern
5, most expensive
6, bigger
7, best
8, worse
9, noisiest
10, most historic
11, better
12, the most comfortable
in sentence 2 there are 2 mistakes: incorrect word order and sequence of tense rule not followed.
Incorrect: First, he explained what are transistors.
Correct: First, he explained what transistors were.
In sentence 3 there are 2 mistakes: incorrect punctuation and sequence of tense rule not followed
Incorrect: He said, that they are very small electronic devices used in telephone, automobiles, radios, and so on.
Correct: He said that they were very small electronic devices used in telephone, automobiles, radios, and so on.
In sentence 4 there is one mistake: sequence of tense rule not followed.
Incorrect: He further explained that transistors control the flow of electric current in electronic equipment.
Correct: He further explained that transistors controlled the flow of electric current in electronic equipment.
In sentence 5 there is one mistake: sequence of tense rule not followed.
Incorrect: He wanted to know which popular technological invention cannot operate without transistors.
Correct: He wanted to know which popular technological invention could not operate without transistors.
In sentence 6 there are 3 mistakes: incorrect punctuation, sequence of tense rule not followed, and omitted subordinator that.
Incorrect: Most students agreed, it is the personal computer.
Correct: Most students agreed that it was the personal computer.
In sentence 7 there are 3 mistakes: 2 times sequence of tense rule not followed and incorrect word order.
Incorrect: Professor Sanchez then asked if the students know how do transistors function in computers.
Correct: Professor Sanchez then asked if the students knew how transistors functioned in computers.
In sentence 8 there is one mistake: sequence of tense rule not followed.
Incorrect: He said that the transistors were etched into tiny silicon microchips and that these transistors increase computers' speed and data storage capacity.
Correct: He said that the transistors were etched into tiny silicon microchips and that these transistors increased computers' speed and data storage capacity.
In sentence 9 there are 2 mistakes: incorrect word order and incorrect punctuation.
Incorrect: Then he asked the class when had transistors been invented?
Correct: Then he asked the class when transistors had been invented.
In sentence 11 there is one mistake: sequence of tense rule not followed.
Incorrect: The professor said that he is correct.
Correct: The professor said that he was correct.
In sentence 12 there are 2 mistakes: incorrect word order and incorrect punctuation.
Incorrect: Professor Sanchez then asked what was the importance of this invention?
Correct: Professor Sanchez then asked what the importance of this invention was.
In sentence 13 there is one mistake: sequence of tense rule not followed.
Incorrect: Many students answered that it is the beginning of the information age.
Correct: Many students answered that it was the beginning of the information age.
In sentence 15 there is one mistake: subjunctive verb not used.
Incorrect: He requested that each student chooses a topic by next Monday.
Correct: He requested that each student choose a topic by next Monday.
In sentence 16 there is one mistake: subjunctive verb not used.
Incorrect: He suggested that the papers are typed.
Correct: He suggested that the papers be typed.
Etna is an active volcano. The volcano is on the island of Sicily.
A. Etna, which is on the island of Sicily, is an active volcano.
B. Etna which is on the island of Sicily, is an active volcano.
C. Etna, which is on the island of Sicily is an active volcano.
D. Etna, which is on the island of Sicily, is active volcano
“What’s your trouble?” my mother asked.
A. My mother wanted to know what my trouble was.
B. My mother asked what my trouble is.
C. My mother wanted to know what trouble is.
D. My mother asked me what was my trouble.