The landscape photographer is the lighting conditions that are present at the time of the

问题补充：

The landscape photographer is the lighting conditions that are present at the time of

the shoot.

A. at the expense of

B. at the risk of

C. in the way of

D. at the mercy of

答案：

A. at the expense of

B. at the risk of

C. in the way of

(答案→)D. at the mercy of

解析：短语辨析。A.以……为代价 B.冒着……的风险

C.关于……方面 D.受……支配。根据题意，风光摄影受现场拍摄环境的照明条件影响。故选D。