Question

read the sentence.
to make the sword stronger, the blacksmith repeatedly heated the blade in fire and then put it into cold water.
now, revise the sentence to show that the sword was thrust quickly into the water.
to make the sword stronger, the blacksmith repeatedly heated the blade in fire and then
______ it into cold water.
plunged deposited wedged inserted

Explanation:

We need to choose a word that means "thrust quickly" into the water. "Plunged" implies a quick, forceful movement into a liquid, which fits the context of quickly thrusting the sword into cold water. "Deposited" means to place or leave, not quickly; "wedged" means to force into a narrow space, not related to quick thrusting into water; "inserted" is more about putting something into a space, not necessarily quickly or forcefully into water.

Answer:

plunged