Answer: A) He is so shy that he cannot speak in public.
Explanation for this question is being written.
Answer: A) He is so weak that he cannot walk.
Answer: D) They are so tired that they cannot work.
Answer: C) An action that cannot be done due to an extreme quality.
Answer: A) He is so tired that he cannot walk.
Answer: A) You're not old enough to read this book.
Answer: A) The skis were too expensive for us to buy.
Answer: C) Time
Answer: D) Make it in.
Answer: A) She is too tired to complete her homework.