Concept:Gap 76 tests knowledge of boxing vocabulary for a punch thrown with a bent arm from a side angle.
Explanation:In boxing, a "hook" is a short-range punch thrown with a bent arm.
It is delivered sideways toward the opponent's head or body.
Because the boxer must swing widely, he often leaves his face or body unprotected.
In the passage, Jim throws a right punch but "left himself open" and was hit by a counter punch.
This exactly describes a hook.
"Knock", "smack", and "kick" do not name a standard boxing punch with this movement.
"Knock" usually means to strike or to knock down, not a specific punch.
"Smack" is a general slap or blow, and "kick" uses the leg, not the fist.
Answer:A. hook