Explanation

"Wise people do not spend their money foolishly."

• "Wise" is an adjective describing people.

• We use adjectives before nouns (e.g., wise people).

• "Wisely" is an adverb, and "wisdom" is a noun — both do not fit here.

Explanation

"An honest person always speaks the truth."

• "Truth" is a noun and is the correct object of the verb "speaks".

• "True" is an adjective, and "truly" is an adverb — neither fits grammatically here.

Explanation

"I laughed at him for making a silly mistake."

• "Laughed at" is the correct phrase used when you are mocking 

• "For" is used to explain the reason for the action (in this case, making a silly mistake).

Explanation

"Even his opponents admit that he is endowed with rare talents."

• The verb "endowed" is commonly followed by "with" when describing the possession of a particular quality or talent.

• "With" is the correct preposition in this context.

Explanation

"He seems to be quite contented with his life."

"Contented" is commonly followed by "with" to indicate satisfaction or happiness with something.

"With" is the correct preposition in this context.

Explanation

Intensive verb is the verb which has subject complement and the complement refers to the subject.

"Laughs" shows the action performed by the boy, so it is a verb.

It describes what the subject (the boy) is doing.

Explanation

Infinitives are a special form of verbs that can be used as a noun, adjective, or adverb.

They are usually made by adding the word to before the base verb, and they can be useful when discussing actions without actually doing the action.

"To go" is the base form of the verb with 'to', which is called an infinitive.

It acts as the object of the verb "want."

Explanation

A coordinating conjunction is a word that joins two elements of equal grammatical rank and syntactic importance.

They can join two verbs, two nouns, two adjectives, two phrases, or two independent clauses.

The seven coordinating conjunctions are for, and, nor, but, or, yet, and so.

Explanation

An adverb is a word or an expression that generally modifies a verb, adjective, another adverb, determiner, clause, preposition, or sentence.

Adverbs typically express manner, place, time, frequency, degree, level of certainty, etc., answering questions such as how, in what way, when, where, to what extent.

Explanation

"Cities" receives the action of the verb "polluting," so it is the direct object.

The structure is: Subject (Automobiles) + Verb (are polluting) + Object (cities).