Explanation

The largest river in Pakistan is the Indus River.

It is the National River of Pakistan

The Indus River starts in Tibet

It originates from the Mansarovar lake

They flow through India, Pakistan,

It finally falls into the Arabian Sea near Karachi.

They start making a delta near the city of Thatta

The old name of the Indus River was Sindhu

There 6 Barrages constructed in the Indus River

The Length of the Indus River is 3,180 km

The 2nd source of  Indus River is Gar Tsangpo

The upper Indus Plain starts from Kalabagh

The upper Indus Plain ends at Mithankot 

Additional information:

The second longest river of Pakistan is Sutlej river.

Explanation

Alexander Graham Bell is often credited with being the inventor of the telephone since he was awarded the first successful patent. 

Telephone was invented in 1876.

Graham Bell made the first-ever telephone call to his partner, Thomas Watson.

Explanation

The intensity of earthquake is measured by Richter Scale.

Richter Scale was invented in 1935.

Explanation

Lactometer is used for milk

**

A lactometer is an instrument that is used to check for the purity of milk by measuring its density.

 lactometer works on the principle of gravity of milk.

***

Explanation

Explanation

New York is also known as the City of Sky Scrapers.

New York City is renowned for the concentration of high-rise buildings, commonly known as "the skyscrapers".

New York is the most populous city in the United States.

New York, a constituent state of the United States of America.

Explanation

Weak means کمزور

Muscular means طاقتور جسمانی

Explanation

Motorola was the first company to produce a handheld mobile phone.

On April 3, 1973, Martin Cooper, a Motorola researcher and executive, made the first mobile telephone call from handheld subscriber equipment, placing a call to Dr. Joel S. Engel of Bell Labs, his rival.

Explanation

Here 'yesterday' shows something happened in the past.

This sentence is also simple.

We generally use second form of verb in simple sentence of Past Indefinite Tense. 

Note: Do is the first, did is the second while done is the third form of verb. 

We did a lot of work yesterday means کل ہم نے بہت سارا کام کیا

Explanation

Always means ہمیشہ

Never means کبھی نہیں

Often means اکثر

Rarely means کبھی کبھار