A、  B、  C、  D、  B

admin2011-01-05  14

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) Several clouds are moving in.
(B) A guide is giving an explanation.
(C) Some of the people are reading books.
(D) The flowers are planted in a row.

选项 A、 
B、 
C、 
D、 

答案B

解析
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