20 , Barringer Crater in the American state of Arizona, measuring 1,200 m in diameter and some 170 m deep, was produced by a meteorite impact.
答案：(C) For example
前句提到大型隕石可能造成劇烈爆炸與破壞，本句舉巴林傑隕石坑為具體實例，屬「舉例」的邏輯關係，故用 For example；Indeed（的確）、Nevertheless（然而）、In short（總之）皆不符合舉例語意。
四個轉承語擺在一起，很容易憑讀起來順不順挑一個。這一類題目其實有更快的做法：先問前一句在做什麼、本句在做什麼，兩句之間的關係就決定了答案，不必靠語感。
前一句是 Large meteorites can cause great explosions and much destruction on the surface of the Earth.（大型隕石可能在地表造成劇烈爆炸與嚴重破壞），這是一句通則。本句搬出亞利桑那州的巴林傑隕石坑，還附上直徑一千二百公尺、深約一百七十公尺這些具體數字。從通則走到一個具體的個案，這正是 For example 的工作。判斷這一類題目，一律先確認本句是把前一句換句話說、往前推進了一步，還是舉了一個例子。
Indeed（的確、確實）是把前一句的說法再加重一層，但本句並沒有加重，它是換到一個具體案例上。Nevertheless（然而）要求前後轉折，可是這兩句同向，隕石坑正是破壞力的證據，不是反例。In short（總之）用來收攏前面講過的一串內容做總結，但本句反而比前一句更細、更具體，方向剛好相反。鑑別度 43，分開的是有沒有動手確認兩句之間的關係，還是停在哪一個讀起來比較順。
for example（舉例來說）、indeed（的確，加強前面的說法）、nevertheless（然而，表轉折）、in short（總之，做總結）、measuring ＋ 尺寸（量起來有……，分詞片語放在名詞後面）、be produced by（由……造成）
Do you know the difference between the terms meteoroid, meteor, and meteorite in astronomy? Many people find these words confusing. However, the difference is all about their 16.
Meteoroids are far up in the sky. They are chunks of rock or metal that speed through space. Some are very large and may be hundreds of feet wide. Others 17 the size of a small stone. Most meteoroids travel around the sun in space and stay away from the Earth. However, sometimes a meteoroid will enter the Earth's atmosphere. Friction with the atmosphere will cause it to 18 and burn while traveling at high speed.
As a meteoroid begins to burn in the atmosphere, it leaves a streak of light. When this tail-like light is falling down toward the Earth, it is called a meteor, or a shooting star. Most meteors vaporize completely before they hit the ground.
If any meteor 19 its fiery journey through the atmosphere and lands on Earth, it is called a meteorite. Large meteorites can cause great explosions and much destruction on the surface of the Earth. 20 , Barringer Crater in the American state of Arizona, measuring 1,200 m in diameter and some 170 m deep, was produced by a meteorite impact.