小题1:这家公司决定开展一个全国性的广告活动来推广自己的产品。（campaign）
小题2:在任何情况下我们都不能以牺牲环境为代价来发展经济。(倒装)
小题3:每个市民都应该尽自己的一份力来抵制在动物身上进行试验。（do one’s part）
小题4:画廊老板根据自己的经验断言这个年轻人提供的油画是一个赝品。（maintain）
小题1:The company has decided to launch a nationwide campaign to promote its products.
小题2:Under no circumstances / In no case / By no means / At no time / In no way / By no means should we develop the economy at the cost / expense of the environement.
小题3:Every citizen should do his part to resist experiments on animals.
小题4:Based on his experience, the owner of the gallery maintained that the painting provided by the young man was (a) fake.
小题1:The company has decided to launch a nationwide campaign to promote its products. 其中campaign作名词，活动。
小题2:Under no circumstances / In no case / By no means / At no time / In no way / By no means should we develop the economy at the cost / expense of the environement. 含有no的短语位于句首时。句子要倒装句。
小题3:Every citizen should do his part to resist experiments on animals. do his part 意为：尽每个人的一份力做某事。
小题4:Based on his experience, the owner of the gallery maintained that the painting provided by the young man was (a) fake. maintain 除了“保持”的意思外，还有“断言、宣称”的意思。