A、  B、  C、  D、  C图中是一个礼堂。图中没有人，也看不到电灯，因此(A)和(C)是错误的。当题目中出现install这个单词时，往往是解题的关键，需要多加注意。图中空无一人，所以(D)当然也是错误的。

(A) The train is carrying containers.
(B) The train is leaving the station.
(C) The trees are being cut down.
(D) Containers are being put on the train.

(A) The people have left the building.
(B) The lights are being installed.
(C) The seats have been arranged in rows.
(D) Some of the seats are occupied.