For these questions, choose the option that best complete the gap(s) The doctor listened to my heartbeat with a .........

Analyze the question: We need the instrument a doctor uses to listen to the heartbeat.

Explain the concept: Medical instruments are named after what they do. The word parts help:

• steth(o)- means chest, and -scope means an instrument for viewing or listening. A stethoscope is used to listen to sounds inside the chest, such as the heart and lungs.

Check each option:

• A. Cardiograph: cardio means heart and graph means to write or record. It records the heart's electrical activity as a trace (ECG). It does not let a doctor listen to the heartbeat.
• B. Stethoscope: Doctors place it on the chest and listen to the heartbeat directly. This fits the sentence.
• C. Chromometer: An instrument for measuring colour, so it is not medical here.
• D. Microscope: Used to view very tiny objects like cells and bacteria, not to hear sounds.

Answer: The doctor listened to my heartbeat with a stethoscope.

Exam tip: Match the verb to the instrument. Listen goes with stethoscope, record with graph (cardiograph), and view tiny things with microscope. Learning word roots like -scope (see or view) and -graph (write or record) helps you work out many unfamiliar words in JAMB English.