Explanation

The preposition "at" is used with specific times.

So "at 9 o'clock" is the correct form.

Explanation

He asked me whether I would help him is correct.

In indirect speech, a yes/no question with "will" changes to "would," and "will you" is converted to "whether I would" to report the question accurately.

Explanation

He ordered him to leave the room and forbade him to return is correct.

In indirect speech, "said to" changes to "ordered" for a command, and "do not return" becomes "forbade him to return" to express prohibition.

Explanation

The question asks to convert a sentence into indirect speech (passive voice in this case).

"I remember myself being taken to the museum by my sister."

– The word "myself" is unnecessary and grammatically incorrect here.

Explanation

The sentence "Haris said, 'How clever I am'" is a statement, but the phrase "How clever I am" is an exclamation that indicates excitement or pride.

So, the correct interpretation is that Haris exclaimed (or said with emphasis and excitement) that he was very clever.

Explanation

A browser, such as Chrome or Firefox.

It is a software application used to access and display websites on the internet.

A web browser is application software for accessing the World Wide Web or a local website.

Explanation

Pathology is the branch of science that focuses on the causes, effects, and nature of diseases in organisms.

It studies both the structure and function of diseased tissues and organs.

Explanation

Lata Mangeshkar's first tutor was Ustad Aman Ali Khan, a renowned Hindustani classical singer and musician.

He was her initial mentor and taught her the basics of music and singing.

Explanation

The Vienna Convention on the Law of Treaties (VCLT) 1969 is an international agreement that provides the framework for the creation, interpretation, and enforcement of treaties.

Article 2 of the VCLT defines a treaty as:

• "an international agreement concluded between States in written form and governed by international law, whether embodied in a single instrument or in two or more related instruments and whatever its particular designation."

Explanation

Surena, developed by the University of Tehran.

It is a humanoid robot created to advance robotics research and demonstrate technical capabilities in Iran.

It showcases complex movements and human-like interactions.