[单项选择]He is a(n) ______ and well-behaved child, but his parents worry about him for he talks too little. A. obedient B. transient C. conscious D. passionate
参考答案: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tran