Question

.... I knew the answers well, I managed to finish the exam in time ( if, though, when , as)​

Answer 1

As I knew the answers well, I managed to finish the exam in time

• The term as acts as both preposition or a conjunction. It is used when describing a likelihood or an extent.
• For example - As a matter of fact, Lara is a top performing student.
• In the sentence the person completed the exam in time because he knew the answers.
• Thus, the correct sentence is - As I knew the answers well, I managed to finish the exam in time

Answer 2

Answer:

.... I knew the answers well, I managed to finish the exam in time : if, though, when , as

• As I knew the answers well, I managed to finish the exam in time.

• As is one of Subordinating Conjunctions.

• Sub-Ordinating Conjunctions join Sub-ordinate sentences with Principal sentences [ Sentences of higher rank ].

• As is used for many purposes. They are discussed below with examples.

• Reason or Cause : As he is ill, he will not come.

• Time : As he came out of the room he saw me.

• Manner : Do as you think.

• Concession or Contrast : Old as he is, he is able to walk.

• As has been used in the blank space to indicate Reason or Cause.