The __letter in the word "develop" is "v"

所给答案为什么是A, 而不是B呢?The underlined word “develop” in the passag “in the end is the word,and the word is man and the word is In the beginning is the word develop an interest in 能换成develop the interest Which word is the longest word in the world? China is one of the _____(develop) countries in the world. chain is one of the（ ）（develop）countries in the world There is( )n in the word moom There is ( ) "a" in the word "lake". which is the longest word in english there is (）”s”in the word there is [ ] in the word us