Select the most appropriate word to fill in the blank.
Let us know ______ you change your mind.
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. in case.
The most appropriate word for the filler is 'in case', which means to talk about things for possible future situations.
Sentence: Let us know in case you change your mind.
Although is used to introduce a clause without a verb.
However is used when we want to convey in whatever manner.
Suppose is used to mention a possible situation.