【简答题】He is becoming more and more (act) ______ in sports and music.
【单选题】.He went to the States in 1910,by _________ time he had learnt to dance and act in comedies.
【单选题】. He _______ to act out the story he had read, but he failed.
【单选题】下列哪项因素一般与肝细胞癌的发生无关()。
【单选题】奶酪是由牛乳腺上皮细胞分泌的乳汁浓缩制成的营养品。检测得知,牛乳汁中含有乳糖、乳脂、酪蛋白、抗体等成分。下列叙述正确的是( )。
【单选题】He ______ unwisely, but he was at least trying to do something helpful[1999]
【简答题】He is ardently______(act)for the cause of environmental protection.