Some house plants grow better if placed near a window with plenty of sunlight others prefer to be in a more shaded spot.
A. unless
B. since
C. when
D. while
网友回答
A. unless
B. since
C. when
(答案→)D. while
解析：考查连词：A. unless除非B. since自从，既然 C. when 当…时候，既然D. while当…时候，然而，虽然，句意：一些室内植物如果放在有充足的阳光的窗户旁边就长得很好，然而有的喜欢在有阴凉的地方。选D。