공부하다가 모르는게 있어서요.. 
 1. Called the compact disc( CD) plyer, it utilizes a tiny laser beam in place of the traditional stylus to read recorded audio information from a reflective 4 3/4-inch disc.

  이 문장에서 called 앞에 뭔가가 생략된 것 같은데요.. 잘 모르겠어요.. --;

2. Since the war our country has taken many important steps ＿.
 (a) to release its financial difficulties
 (b) to improve its economic situation
 (c) to ascend its financial standing
 (d) to achieve its economical betterment

    의미상으로는 다 맞는 것 같은데.. 단어의 뉘양스 차이인가요? 설명좀 해주세요..

3. the poor farmer was stricken by a lighting.
  stricken을 struck 로 고치라고 하던데요..  어떤 차이가 있나요?
  사전을 찾아보니까  strike -struck - struck or stricken 라고 나왔던데요..