A、  B、  C、  D、  B应仔细观察人们在露天市场以及周围的环境。

(A)The bicycles have been placed in a rack.
(B)A structure is being built near some trees.
(C)A tire is leaning against the fence.
(D)The leaves have been raked into a pile.

(A)Some magazines are piled in a rack.
(B)Some merchandise is being displayed on the ground.
(C)A shopper is unfolding an umbrella on the street.
(D)A person is Organizing some items at a market.