Question

they ________ have filled the car with petrol before they set off​

Answer 1

already

hope this helps you.

pls mark as brainliest.

Answer 2

Answer:

They might have filled the car with petrol before they set off​.

Explanation:

The other words which can be filled in the blank given are ought to, would, should, already etc.

Rules to follow while filling the blanks are -

• Should relate with the context completely.
• After attempting, reread the sentence to check.
• Sentences should have a proper meaning to it.
• Check for the mistakes or errors if any.
• One should have good vocabulary so that they can use trial and error method to find answers.
• Should have knowledge on idioms and phrases to find missing words.
• Grammatical mistakes should be checked (i.e., articles and prepositions).