takes over will replace overtakes.
take over : to gain control of a political party, a country, etc.
overtake (Verb) : to go past a moving vehicle or person ahead of you because you are going faster than he is Hence, takes over is the right usage

Correct Option: B

takes over will replace overtakes.
take over : to gain control of a political party, a country, etc.
overtake (Verb) : to go past a moving vehicle or person ahead of you because you are going faster than he is Hence, takes over is the right usage

left will replace leave because –
We use the following expression –
it’s time/it’s high time + Subject + Past Verb form to refer to the present moment
Look at the examples given below :
It is time we went home.
It is high time you went on a diet.
Hence, that we left is the right usage

Correct Option: B

left will replace leave because –
We use the following expression –
it’s time/it’s high time + Subject + Past Verb form to refer to the present moment
Look at the examples given below :
It is time we went home.
It is high time you went on a diet.
Hence, that we left is the right usage

does not rain will replace does not rains
When the Main clause has a Modal Verb (will, shall, would) and is in Simple Future, the If clause will be in Simple Present Tense.
The form is as follows :

Correct Option: C

does not rain will replace does not rains
When the Main clause has a Modal Verb (will, shall, would) and is in Simple Future, the If clause will be in Simple Present Tense.
The form is as follows :

It being very dark will replace being very dark
This is an error of Unattached subject/Participle A Participle must modify the Subject of the sentence.
Look at the examples given below :
Having bitten the boy, the farmer killed the snake. (×) This sentence means that it was the farmer who bit the boy and not the snake. It should be, therefore, rewritten as
The snake having bitten the boy, the farmer killed it. ( )

Correct Option: A

It being very dark will replace being very dark
This is an error of Unattached subject/Participle A Participle must modify the Subject of the sentence.
Look at the examples given below :
Having bitten the boy, the farmer killed the snake. (×) This sentence means that it was the farmer who bit the boy and not the snake. It should be, therefore, rewritten as
The snake having bitten the boy, the farmer killed it. ( )

luggage is will replace luggages are because –
Plural of luggage is luggage (Uncountable Noun)
Hence, the luggage is heavy is the right usage

Correct Option: C

luggage is will replace luggages are because –
Plural of luggage is luggage (Uncountable Noun)
Hence, the luggage is heavy is the right usage