24. One sign that you are making progress in an art such as painting or photography is when you begin to realize how much there is to learn.
(A)you are (B)such as (C)is (D)when
Dex Shih 高三上 (2014/04/12) 網路:One sign that you are making progress in an art such as painting or photography is that you began to realize how much there is to learn