题目

用括号内所给单词的适当形式填空。 1.English is regarded as an ________(internationally) language. 2.He has been ________(die) for two years. We still miss him. 3.His ________(pronounce) has improved，but he still does much practice every day. 4.France and Germany are both ________(Europe) countries. 5.It is a good ________(choose) for Millie to study Chinese history in Beijing.硫在氧气里燃烧，产生    色火焰，实验时，要在集气瓶中预先加入少量的水，其目的是    ．请写出硫与氧气发生反应的文字表达式    ．