問題文全文(内容文)：
『高校英文法14日間完成　効率特化型問題集 Agile 300』という問題集のChapter1英文法力診断テストの解説をしています。

問題文全文(内容文)：
次の問いにおいて、文章中の（　　）に入れるべき文が三つ、順不同で下のA～Cに示されている。
論理的な文章にするのに最も適当な配列のものを、それぞれ下の1～6のうちから選べ。

【問】
Throat microphones, which pick up the vibrations of normal
speech directly through the skin rather than through the air,
are useful in extremely noisy situations such as when
motorcycle messengers on the freeway must communicate
with their headquarters. (　　 ) For now at least, our private
thoughts are safe.

A. While some people worry that a system like this will be able to read
our minds, in its current stage it can only understand a few simple words.

B. The system is sensitive enough to pick up the "inner speech" we use
when we are silently reading or thinking.

C. Now NASA scientists have developed a more advanced system than
throat microphones.

For now at least, our private thoughts are safe.

1. (A)→(B)→(C)
2. (A)→(C)→(D)
3. (B)→(A)→(C)
4. (B)→(C)→(A)
5. (C)→(A)→(B)
6. (C)→(B)→(A)


【問】
Gorillas are social animals with many similarities to humans. When
threatened, a male leader may attempt to protect his group
through aggressive displays which.commonly involve chest-beating
or short rushes toward the danger. (　　 ) Although watching TV or
videos is sometimes said to be harmful to human beings, the
keepers think that this plan might make gorillas "think more about life."

A. In zoos this shyness sometimes develops into inactivity or depression.

B. Some zookeepers in Russia therefore have come up with a plan to give
gorillas a broader experience of life by showing them wildlife videos.

C. However, studies indicate that gorillas are normally quiet, even shy,
animals that live in stable family groups.

...the keepers think that this plan might make gorillas "think more about life."

1. (A)→(B)→(C)
2. (A)→(C)→(B)
3. (B)→(A)→(C)
4. (B)→(C)→(A)
5. (C)→(A)→(B)
6. (C)→(B)→(A)

問題文全文(内容文)：
次の日本文を英文に直しなさい。

練習問題
1)それぞれの生徒は異なる方法で学ぶ。
2)どの発展途上国も同じ問題に直面している。

問題文全文(内容文)：
「if not」の意味が分かりますか？

「if not」が持つ3種類の意味を知って、積極的に使っていきましょう！