12.I feel very excited__ the thought of joining my family in a week..
A、on
B、for
C、at
D、in
II.Vocabulary and Structure(15 points) Directions:There are 15 incomplete sentences in this section.For each sentence there are four choices marked A,B,C and D.Choose one answer that best completes the sentence and blacken the corresponding letter on the Answer Sheet. 6.I asked two passers-by how to get to the new railway station,but___of them knew it.
A、none
B、either
C、neither
D、both
51.What is this passage mainly about?
A、A World Fair held in Chicago in 1893.
B、The popularity of the American candy bar industry.
C、The candy bar industry during World War I.
D、The spread of the candy bar business to the Midwest.