He hoped to sell 26 as material for tents or wagon covers.
答案：(C) it
it 代替前面提到的 canvas（帆布，單數不可數名詞）；much（許多，不是代名詞指代特定物品）、one（不能指代不可數名詞）、others（其他的，不指代 canvas）都不合。
本題大考中心未公布逐題答對率，以下不談數據，只談觀念。
四個選項都是代名詞或量詞，如果沒回頭確認它指的是什麼、那樣東西可不可數，就只能猜。
先確認它指誰：前一句說他帶了很多貨物，其中包括 a large quantity of canvas（大量的帆布）；本句是 He hoped to sell ___ as material for tents or wagon covers.（他希望把……賣掉，當作帳篷或篷車車篷的材料。）他要賣的就是那批帆布。canvas（帆布）是不可數名詞，而指代不可數名詞、而且是指原本那一個東西時，用 it。順便把這一組分清楚：it 指前面提過的那一個特定的東西（可以是不可數，也可以是特定的單數）；one 指「同一類但不是同一個」的可數單數（I lost my pen, so I bought a new one.）；ones／others 是複數。
one：只能代替可數名詞，而且指的是同類的另一個，但他要賣的就是自己帶來的那批帆布，不是另外一批。others（其他的）：複數，而且語意變成「其他東西」，與帆布無關。much（許多）：是量詞不是代名詞，sell much 沒有明確指涉，也接不上 as material for tents 這個補語。
sell sth as（把某物當作……賣）、hope to V（希望做……）、material for（做……的材料）、I lost my pen, so I bought a new one.（one 代替同類的另一個）、a quantity of（一定數量的）、tents（帳篷）。
When Levi Strauss arrived in the United States from Bavaria, he was only seventeen, poor, and knew very 21 English. Like most immigrants, he was 22 a better life. So, when gold was discovered in the West in 1849, he 23 thousands of others and rushed to California.
24 he planned to open a shop in San Francisco, he took many goods with him, 25 a large quantity of canvas. He hoped to sell 26 as material for tents or wagon covers. Business, however, was not 27 he had expected.
28 , as he sat in a cafe in a small town, he had an idea. He saw a man with a hole in the leg of his trousers and 29 realized what Californians 30 for the rough work they were doing—good, strong trousers!