Keep the drawer clean, there were rats__________ the drawer last night.

Answer: Inside

Explanation: The blank requires a preposition that indicates location within the drawer. 'Inside' means located within something, so it correctly completes the sentence: 'There were rats inside the drawer last night.'

• 'Outside' means on the exterior of the drawer, so it does not express being within the drawer.

• 'Above' indicates a position higher than or over the drawer, not inside it.

• 'None of these' is incorrect because 'Inside' is the appropriate choice among the options.

Grammar note: The original prompt used a comma between the two clauses, which creates a comma splice. Better punctuation is:

• Keep the drawer clean. There were rats inside the drawer last night.

• Or: Keep the drawer clean; there were rats inside the drawer last night.