Fill in the blanks in the following sentence with the most appropriat…

The correct answer is Option (2) → at, towards, amongst

Prepositions of place and direction:

• First blank, at: "at some distance" (or "at a distance") is the fixed phrase for a point some way off.
• Second blank, towards: towards shows movement in the direction of something. They rushed in the direction of the trees.
• Third blank, amongst: amongst (among) means in the middle of a group of three or more. They hid in the middle of the trees.
• Complete sentence: As soon as they saw a policeman at some distance, they rushed towards the trees and hid amongst them.

Why the Other Options are Incorrect?

Option 1: on, for, into — Incorrect.

• "On some distance" is not an English phrase.
  Example: The book is on the table.
• "Rushed for the trees" gives a purpose or target, not the direction of the movement.
  Example: The children rushed for the ice cream.
• "Hid into them" is not used. One hides in or among things.
  Example: She walked into the room.

Option 3: off, into, under — Incorrect.

• "Off some distance" is not the phrase for seeing someone some way away.
  Example: He fell off his bicycle.
• "Rushed into the trees and hid under them" can be said on its own, but the first blank already rules this option out. "Hid under them" also places them below the trees rather than hidden among them.
  Example: The cat ran into the house and hid under the bed.

Option 4: in, over, between — Incorrect.

• "In some distance" is not an English phrase.
  Example: The keys are in my bag.
• "Rushed over the trees" means above or across them.
  Example: The plane flew over the city.
• Between is used mainly for two things, not for a number of trees.
  Example: The ball rolled between his feet.

Contrast: "amongst" (among) is used for three or more things. "Between" is used mainly for two.