Explanation

Polymerization is the process where small molecules (monomers) repeatedly bond to form large molecules (polymers).

It's commonly used in making plastics, synthetic fibers, and resins.

Explanation

In indirect narration, the modal "can" changes to "could", and the sentence becomes a reported question.

So, "He said, 'What can I do for you?'" changes to "He asked what he could do for me."

Explanation

"Who did impressive speech on Pakistan day" describes the noun "Sajid," making it an adjective clause.

It modifies and provides more information about the subject "Sajid."

Explanation

The sentence contains a main clause (“The people said”) and a subordinate clause (“as the horses advanced...”), which makes it complex.

Complex sentences have one independent clause and at least one dependent clause connected with conjunctions like “as,” “because,” or “since.”

Explanation

Variety in lesson planning helps keep students engaged and interested by incorporating different activities, methods, and resources.

It ensures that the learning experience remains dynamic and caters to diverse learning styles.

Explanation

An assessment is considered reliable if it produces consistent results when repeated under similar conditions.

Reliability ensures the stability and dependability of test outcomes.

Explanation

The sentence "We have been defeated by them" is in the Present Perfect Passive tense.

It follows the structure: have/has been + past participle.

Explanation

Curriculum is the structured framework of what students need to learn.

It plays a key role in guiding the education process towards achieving its goals and objectives.

A well-designed curriculum ensures that students acquire knowledge, skills, and values systematically, facilitating their overall development and academic success.

Explanation

Present Continuous tense shows actions currently in progress.

Example: She is reading a book now.

Explanation

"Ourselves" is a reflexive pronoun that correctly refers back to the subject "Sara and I."

Reflexive pronouns are used when the subject and object of the sentence are the same, which is the case here.