Zheng He's travels were so important that they are still studied today. Work out the rule We use So before an adjective (without a noun)or an adverb. His voyages were such a huge achievement that people still remember him. Work out the rule We use s such before (an adjective +)a noun.Work out the rule We use __ before an adjective (without a noun) or an adverb. Zheng He ’s travels were so important that they are still studied today. so His voyages were such a huge achievement that people still remember him. Work out the rule We use __s_u_c_h___ before (an adjective +) a noun