Explanation

The preposition “in” shows something inside.

The phrase "rich in" is a standard English idiom used to describe something that contains a large amount of a particular substance or quality.

Explanation

I have not seen you for a long time.

میں نے آپ کو بہت دنوں سے نہیں دیکھا۔

"Have not seen" is the present perfect negative form.

- The subject "I" pairs with "have" (not "has").

Explanation

He participated in a quiz competition.

اس نے کوئز مقابلے میں حصہ لیا۔

- "Participated" is the simple past tense, which fits well here. 

Explanation

It is lovely to wake up in the morning and hear birds singing.

صبح اٹھنا اور پرندوں کو گانا سننا اچھا لگتا ہے۔

Explanation

I have never known him for a long time.

میں اسے ایک عرصے سے کبھی نہیں جانتا تھا۔

"Have never known" is the correct present perfect tense.

It indicating that up until now, the speaker has never known the person.

Explanation

This completion is appropriate because it uses the future tense ("will write") to indicate an action that will happen after another action (coming in).

Explanation

 Last year I worked in a bank.

پچھلے سال میں نے ایک بینک میں کام کیا۔

"Last year" indicates the past, so the simple past tense "worked" is appropriate here.  

Explanation

"He will participate in a quiz compilation next week."

This is because "will participate" is used to describe a future action.

Explanation

The correct preposition is “into” when something moves from outside to inside a place.

Sentence becomes: “The cat fell into the well.”

Explanation

The correct phrase is “good at something”.

So the sentence becomes: "My teacher is not good at communicating skills."