Jawaban:

1. It's important for every student to have a book.

2. Each of the students in my class has a book. (no change)

3. Spain is one of the countries I want to visit.

4. The teacher gave each of the students a test paper.

5. Every student in the class did well on the test. (no change)

6. All furniture in that room is made of wood.​

Penjelasan:

1. Kata every dipakai untuk singular noun, jadi student bukan students

3. "One of" harus diikuti plural noun (kata benda jamak), jadi countries, bukan country

4. the the berfungsi sebagai Definite Article, untuk menjelaskan bahwa students yang dimaksud bukan students secara umum (semua yang berstatus stundent, tapi hanya students tertentu yaitu yang diajar oleh teacher tersebut).

6. kata every dipakai untuk singular noun, sedangkan furniture bukan singular noun tapi uncountable noun, jadi dipakai all, bukan every.

Contoh uncountable noun: water. Kita tidak boleh mengatakan "Every water", tapi "all water"

Semoga membantu