Đáp án B
– đại từ where = giới từ + which thay thế cho chủ ngữ là địa điểm.
Surprisingly, however, psychologists (99)________ that most victims are middle-aged housewives who have never used a computer before.
Undoubtedly, medical science will continue to (15) ________. Some people will be able to avoid medical problems that are unavoidable today.