Who wants to learn ChineseJust about 1. in the world.Why people want to learn ChineseFor 2. opportunities.For better understanding about Chinese 3. .Regarding it as a 4. .Why people think Chinese is difficultThe tone system is difficult because it is 5. and also very different to other languages.An international exam system the HSK test6. in 1990, it was initially7. those regarding Chinese as a second or foreign language.Later, it was introduced 8. .先背熟先背熟再悟通再悟通后仿用后仿用先背熟先背熟再悟通再悟通后仿用后仿用reject用于正式场合，如外交或商业条款之类，另外还有用于正式场合，如外交或商业条款之类，另外还有“抛弃，剔除抛弃，剔除”之意，后常接名词之意，后常接名词refuse普通用词，后接双宾语、名词或不定式普通用词，后接双宾语、名词或不定式decline常用于婉转地拒绝，近似汉语的常用于婉转地拒绝，近似汉语的“谢绝谢绝”，后接名，后接名词、动词、不定式词、动词、不定式