Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
She had many troubles in her life, but she always looked（ ）at the world. (cheerful)
【正确答案】：CHEERFULLY
【题目解析】：
本题考查常见形容词的副词形式。
but后句子结构完整，故空缺处应填副词修饰动词looked，cheerful是形容词意为“高兴的、乐观的”，其副词形式是cheerfully意为“令人愉快地、乐观地”，符合题意。
句意：她生活中有许多烦恼，但她总是乐观地看着这个世界。