Ý bạn là ở chỗ trống số $(5)$?. 

Bạn điền neccessary là đúng vì nó là adj. 

Ex its neccessary for me to do st. 

Làm bài : 

In the UK there is no legal (1)obligatory  (oblige) for children to go to school, but they have to receive an effective full-time (2)…….education .(educate). Nowadays some parents are talking on the (3)……responsibility..(responsible) of teaching their children at home. Parents do not have to be (4) academic…(academy) qualify but it is (5)neccessary . (need) to have access to libraries and teaching materials. They should also provide a (6)suitable .(suit) classroom-like environment at home. The results are (7)…impressive.(impress). Which surprises many people. Some children who were (8)……attended…(attentive) in a large class change into model pupils. By far the biggest problem for parent-teachers is the (9)…sympathetic…..sympathy attitude of other adults who say children don’t socialize. But most of them seem (10)…perfectable…..(perfect) at case with other children. 

1. Obligation

2. Education

3. Responsibility

4. Academically

5. Needed / necessary - Hai từ này đồng nghĩa với nhau nhưng nếu bám sát với đề nhất thì phải là needed

6. Suitable

7. Impressive

8. Attended

9. Sympathetic

10. Perfectible