“三小戏”是以（）为主的戏，如《拾玉镯》、《柜中缘》等。
参考答案：小生、小旦和小丑
晚期习惯性流产最常见的原因是
A．孕卵发育异常
B．子宫发育不良
C．染色体异常
D．宫颈内口松弛
E．黄体功能不全
He was dismissed by his boss not because he was inexperienced but because he was not enough careful.
