Question 6 of 74

One and half million barrels of oil flows every day through the pipeline, which stretches across 1,263 km of harsh terrain

Answer

Suggested Answer

The suggested answer is D.

This sentence has an error by lacking an article before a quantitative adjective (one and half). There are two halves in one so an indefinite article must take place before the word 'half. Option A has no article in it. Option B uses an indefinite article (an) that is used before a word that starts with vowel sound. Option C uses the definite article (the). Option E uses an incorrect form of adjective (One half). Option D uses the correct article that is used before the word (One and a half) that starts with a consonant sound as 'half; hence, it the correct answer.
Question 7 of 74

That who dream of striking it rich can still try panning for gold in some of the mines and relive the past on a guided tour.

Answer

Suggested Answer

The suggested answer is D.

This sentence has an error by using a conjunction (that) in the place of a pronoun. Option A uses a conjunction in the place of a pronoun. Option B uses a plural pronoun (these) that is used when there are something near or defined nouns nearby. Option C uses a singular pronoun (this) that cannot be applicable. Option E uses a third person plural personal pronoun (them). Option D uses the appropriate plural indefinite pronoun (those); hence option D is the correct answer.
Question 8 of 74

The heart of Fairbanks town is covered with flowers; there were banquets hanging in large clusters from the walls of buildings, and flowers line the sides of Chena rivers innumerous hues.

Answer

Suggested Answer

The suggested answer is B.

This sentence has an error in the verb-time agreement. The whole sentence is in the present tense so a verb of past tense (were) should be changed into present tense plural verb to make the sentence correct. Option A uses a past tense plural verb (were). Option C uses a present tense singular verb (is). Option D uses a past tense singular verb (was). Option E uses an indefinite pronoun (some) in the place of a verb. Option B uses a present tense plural verb (are) that is appropriate to the sentence; hence, option B is the correct answer.
Question 9 of 74

It is said that people come to Alaska for six days and end up staying there for a six years

Answer

Suggested Answer

The suggested answer is C.

This sentence has an error by using an article in an irrelevant place. Usually before the adjectives of numbers articles are not used. Options A, B and D use articles (a/ an/ the) that are irrelevant to the context. Option E uses an indefinite pronoun (some) which also irrelevant. Option C is correct, without any article
(staying there for six years) it gives a complete meaning to the sentence; hence, option C is the correct answer.
Question 10 of 74

It is not so much unemployment on the youth that is worrisome but the deteriorating working conditions, especially of those in the informal economy.

Answer

Suggested Answer

The suggested answer is D.

This sentence has an error in the use of preposition. 'Youth' is a common noun so the preposition 'among' must be used as option D, whereas other options use inappropriate prepositions {on/ in/ of/ between) that are irrelevant too. Option D is the correct answer.