She's been very ______ and upset about this whole situation. A: deleted B: confessed C: depressed D: diluted

There are___________changes<br/>in environmental conditions from freezing cold to extremely hot, and<br/>from dry to very humid (潮湿的). A: gigantic B: nutrition C: evacuated D: diluted

To restore the darkened ancient oil painting to its original white color, the method is A: to scrub by diluted H2O2 solution B: to scrub by water C: to paint with TiO2 D: to bleach with SO2

A gulf remains between negotiators from the rich world, who are so skeptical they hope to see the treaty’s ambitious provisions（）, and those from poor countries, who want them（）. A: explicated ；ignored B: diluted ； strengthened C: absconded ； delivered D: reinforced ； removed E: relaxed ； loosened