Books are to mankind __(30)__ memory is to the individual. They contain the history of our race, the discoveries we have made, the __(31)__ knowledge and experience of ages; they __(32)__ for us the marvels and beauties of nature; help us in our difficulties; comfort us in sorrow and suffering; change hours of weariness into moments of delight; __(33)__ our minds with ideas, fill them with good and happy thoughts, and lift us __(34)__ ourselves.
【題組】30.
(A) that (B)which (C) what (D) where