The Ministry of Education, Culture, Sports, Science and Technology has announced that the number of students attending elementary and junior high schools in Japan has declined since last year and is the lowest it has ever been.
Japan Today
Ｑ：次の動詞の Ｓ「Ｖ」Ｏ は何ですか？
A:
The Ministry [has announced] that以下の文
OK!the number of students [has declined] Oなし
OK!the number of students [is] the lowest
OK!it [has (ever been)]
OK!
Ｑ：次の準動詞の Ｓ「Ｖ」Ｏ は何ですか？
A:
the number of students [attending] (elementary and junior high) schools
OK!
Ｑ：「前」＋Ｏ のメインの名詞は何ですか？説明しているのは何ですか？
A:
The Ministry ← [of] Education, Culture, Sports, Science (and) Technology
OK!the number ← [of] students
OK!(elementary and junior high) schools ← [in] Japan
OK!declined ← [since] last year
OK!
Ｑ：A「and,but,or」B の A と B は何ですか？
A:
Education, Culture, Sports, Science [and] Technology
OK!elementary schools
[and]
junior high schools
OK!the number of students [has declined]
[and]
the number of students [is] the lowest
Ｑ：この「that」は関係詞、同格、名詞を作る、のどれですか？
A:
名詞を作る。S V (that) 文＝Oなので。
OK!
Ｑ：説明関係を意識して文を読みます。
A:
1. The Ministry (of Education, Culture, Sports, Science and Technology) [has announced] that2. the number of students ([attending] (elementary and junior high) schools (in Japan)) [has declined] (since last year)
3. and is the lowest (it has ever been)