Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Our grandfather, who had an excellent (A) memory when young (B), has become very forgettable (C) in recent years due to his old age (D).

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Reading (A) books has been always (B) my hobby since (C) I was very young (D).

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The spokesman had an uphill struggle to find an explanation that was readily intelligent to the layman.
A B C D

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

All the students must hand his essays by the end of the week.
A B C D

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

The principle of comprehensive (A) inputs states that the language provided (B) for students should go only a little beyond their current (C) experience and understanding (D).

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Thanks to advances (A) in medical science, life expectation (B) for both men and women has improved (C) greatly over the past (D) decades.

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

Their pioneering research (A) showed that the learning motivation of the two groups of learners was quite distinctive (B) from each other, and the comparative (C) group whose learning motivation was stronger performed better than the control (D) group.