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】50. There was such a long line at the exhibition ________ we had to wait for about half an hour.
(A)) as
(B)) that
(C)) so
(D)) hence