Part III Vocabulary and Structure (20 minutes)
Directions: There are 30 incomplete sentences in this part. For each sentence there are four choices marked A, B, C and D. Choose the ONE that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the center. 【題組】61. Contrast may make something appear more beautiful than it is when ________ alone.
(A)) seen
(B)) is seen
(C)) to be seen
(D)) having been seen