Explanation

The sentence talks about a past event ("last birthday"), so past tense is needed.

"Were" is the correct past tense form of "are" for you.

Explanation

The sentence should read: "We missed the bus. Now we'll have to walk."

This indicates that the bus has departed and you were not able to board it, so you will need to walk instead.

Explanation

• 'So' is placed before a modifier — adjective or adverb — to intensify its quality or manner.
• ‘So’ emphasis on the modifier expresses a remarkable situation.
• This clause can stand alone as a sentence, or it can be paired with 'that' + clause to express an effect (result) of the remarkable situation mentioned in the main clause.
• The United States is so big that there are five time zones.

Explanation

The headmaster gave away the prizes

The phrase "gave away" is used because it specifically means to distribute or hand out something

Explanation

My new home is not altogether finished

Altogether is an adverb that means completely/totally. 

Explanation

Correct sentence: "Ali went to the factory by himself."

"To" shows direction, "by himself" shows he went alone.

Explanation

"Based on" means the book uses true events as its foundation.

It’s the correct preposition to show the source or reason behind something.

Explanation

The sentence should read: "My father was so poor that he could not buy us food."

This sentence is a common idiomatic expression used to describe someone's extreme poverty.

The phrase "so poor" is an intensifier, emphasizing the extent of the poverty, and the clause "that he could not buy us food" explains the severity of the situation.

Explanation

The correct phrase is "resistance to diseases."

ہمارے جسم میں بیماریوں کے خلاف غیر معمولی مزاحمت ہوتی ہے۔

"To" is used to indicate the target or focus of resistance in this context.

Explanation