A、  B、  C、  D、  B

admin2011-01-05  10

问题
  
(A) People are waiting in line.
(B) A customer is checking out.
(C) A woman is placing her tray onto the counter.
(D) A man is taking off his apron.
(A) One of the men is walking up the ladder.
(B) All of the people are collaborating at a construction site.
(C) They are carrying a steel bar.
(D) The entire building is covered with vinyl layers.

选项 A、 
B、 
C、 
D、 

答案B

解析
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