1.In the sentence there is a word of four letters hidden between words that are next to each other.Find this four letter word.Example:Scientific paper_s_and_ books._sand_The winter ice covers the pond.____2.The number codes for three of the following four words are given below.These codes are not written in the same order as the words and one of the codes is missing.FOAL COLT CALF LAST5384 8371 5681Work out the correct code for each word and answer th

1.In the sentence there is a word of four letters hidden between words that are next to each other.Find this four letter word.
Example:Scientific paper_s_and_ books._sand_
The winter ice covers the pond.____
2.The number codes for three of the following four words are given below.These codes are not written in the same order as the words and one of the codes is missing.
FOAL COLT CALF LAST
5384 8371 5681
Work out the correct code for each word and answer the following questions.
(1)What word has the number code 8634?( )
(2)What is the code for the word COLT?（ ）
3.What is the five-letter word in English whose pronunciation isn't changed by removing four of its letters?