Explanation:

- The sentence is: "I had passed (1)______ once or twice..."

- The sentence refers to "the magic shop" seen from afar; this is a singular noun.

- Let’s look at the options:

- Option 1: “them” – Incorrect, as "them" is used for plurals.

- Option 2: “these” – Incorrect, "these" refers to multiple things and is plural.

- Option 3: “this” – Incorrect here, as "this" is demonstrative but doesn't fit with the verb "passed."

- Option 4: “it” – Correct, "it" refers to a singular noun and matches "the magic shop" perfectly.

- So, the most natural and grammatically correct answer is option 4: "it."