某人患苯丙酮尿症（智力障碍），可以推断出（ ）
A．他父亲患病
B．他母亲带有显性基因
C．他姐姐患病
D．他父亲和母亲都带有隐性基因
答案：D
You can trust him because he always ________.
A．keeps his words
B．stick to his promise
C．keeps his word
D．keep his promise
多排桩
