Q1. What is the passage mainly about?

1. AHow to make your elbow stronger
2. BWhy people laugh at jokes
3. CWhat the "funny bone" really is
4. DHow bones grow in children

ファニーボーンの正体（骨ではなく神経）を説明しているので C。

Q2. What is the "funny bone" really?

1. AA small bone
2. BA nerve
3. CA muscle
4. DA piece of skin

But it is not a bone. It is a nerve called the ulnar nerve. とあるので B。

Q3. In the passage, "pressed against" means ...

1. Apushed hard onto
2. Bpulled away from
3. Cpainted on
4. Dcut by

press は「押す」。pressed against the bone で「骨に押しつけられる」なので A。

Q1. What is the main idea of the passage?

1. AThe elbow is the weakest bone in the body.
2. BNerves grow faster than bones.
3. CThe little finger is the most sensitive finger.
4. DThe funny bone is a nerve, and hitting it makes the fingers tingle.

ファニーボーンの正体は神経で、ぶつけると指までしびれる理由を説明しているので D。

Q2. Why is the nerve easy to hit at the inner elbow?

1. AOnly skin and a thin layer of tissue cover it.
2. BIt is inside a thick muscle.
3. CIt is the largest nerve in the body.
4. DIt moves down to the wrist.

where only skin and a thin layer of tissue cover it とあるので A。B は本文と逆。

Q3. Why do people feel the shock in their fingers?

1. ABecause the fingers were also hit
2. BBecause the bone breaks easily
3. CBecause the brain treats the signal as coming from the fingers
4. DBecause blood stops flowing to the hand

脳はこの神経からの信号を指からの情報として受け取るため、と書かれているので C。

Q1. What is the passage mainly about?

1. AThe history of the word "humorous"
2. BThe ulnar nerve and why hitting the elbow causes tingling in the fingers
3. CHow doctors treat carpal tunnel syndrome
4. DWhy bones break easily at the elbow

ファニーボーン＝尺骨神経の正体と、指がしびれるしくみが中心なので B。

Q2. What did the 1975 study report?

1. AMost people have no ulnar nerve.
2. BThe nerve is covered by thick muscle.
3. CEveryone's nerve moves when they bend the elbow.
4. DIn about 16 percent of people, the nerve slipped onto the bone when the elbow was bent.

in 16.2 percent of people the nerve slipped out of its groove onto the bone when the elbow was bent とあるので D。全員ではない。

Q3. What does the author suggest about the 16.2 percent figure?

1. AIt may vary depending on how the nerve movement is measured.
2. BIt proves the theory about the nickname.
3. CIt explains how the brain receives signals.
4. DIt shows that cubital tunnel syndrome is very rare.

although the frequency found in later studies depends on how it is measured と、数値の限界に触れているので A。