27. (A)lan is a careful driver, but he drives ______ of my friends. (A). more carefully (B). the most carefully (C). less carefully (D). the least carefully

25.Ⅱ. Grammar and Vocabulary (D)irections: (B)eneath each of the following sentences there are four choices marked (A), (B), (C) and (D). (C)hoose the one answer that best completes the sentence. Leaves are found on all kinds of trees, but they differ greatly ________ size and shape. (A). on (B). form (C). by (D). in