单选题
He is a(n) ______ and well-behaved child, but his parents worry about him for he talks too little.
【正确答案】
A
【答案解析】[解析] 本题空格处是说他是个孝顺和循规蹈矩的孩子。A项obedient“服从的,孝顺的”符合题意,如:be obedient to one's parents(顺从父母/孝顺父母)。其他三项transient“短暂的,瞬时的”;conscious“有意识的,有知觉的,故意的,羞怯的”:passionate“充满热情的”都不正确。