Q1. What is the passage mainly about?

1. AHow to buy a good diary
2. BWhy speaking is faster than writing
3. CWhat English diaries can and cannot do for learners
4. DHow teachers write their diaries

英語日記の良い点（考える時間、記録が残る）と弱点（自分の間違いに気づけない）の話なので C。

Q2. What is the problem with writing alone?

1. AYou cannot find all your own mistakes.
2. BYou write too fast.
3. CYour words disappear.
4. DYou cannot use grammar.

But there is a problem. You cannot find all your own mistakes. とあるので A。

Q3. In this passage, "correctly" means ...

1. Aquickly
2. Bwithout mistakes
3. Cloudly
4. Dbeautifully

correct（正しい）の副詞で「正しく、間違いなく」。直前の mistakes と対になっているので B。

Q1. Which feature of writing did Williams mention?

1. AIt is always done in groups.
2. BIt is faster than speaking.
3. CIt disappears quickly.
4. DIt stays on the page, so learners can review it.

Second, writing stays on the page, so learners can review and correct it. とあるので D。B・C は本文と逆。

Q2. What happened to the learners who planned for ten minutes before writing?

1. AThey made more mistakes.
2. BThey wrote more and used more varied sentences.
3. CThey stopped writing.
4. DThey wrote shorter stories.

learners who planned for ten minutes before writing wrote more and used more varied sentences とあるので B。

Q3. What would the author most likely recommend?

1. AWriting without ever checking
2. BDoing only speaking practice
3. CWriting a diary and sometimes getting it corrected
4. DCopying sentences from a textbook

書くことには利点があるが、自分では誤りをすべて見つけられず、添削が正確さを高めるので、両方を組み合わせる C。

Q1. According to Williams, why does writing support language development?

1. AIt is slow and leaves a permanent record.
2. BIt is faster than speaking.
3. CIt does not require grammar.
4. DIt is always corrected by a teacher.

because, unlike conversation, it is slow and leaves a permanent record とあるので A。

Q2. In Ellis and Yuan's study, what was the advantage of unlimited time while writing?

1. AMore text
2. BMore complex sentences
3. CShorter stories
4. DFewer errors

those allowed unlimited time to think while writing made fewer errors とあるので D。A と B は事前に計画したグループの結果。whereas の前後を区別するのがポイント。

Q3. What caution does the author add at the end?

1. ADiaries harm language learning.
2. BThe conclusions come mainly from related research, not from studies of diaries themselves.
3. CFeedback has been proven useless.
4. DOnly Chinese learners benefit from diaries.

few studies have tested diary writing itself; these conclusions are drawn from related research とあるので B。C は「無意味と証明」が言い過ぎで、異議を唱える研究者もいる、にとどまる。