单项选择Asaprofessionalbasketballplayer，heisserious
来源：语文精选馆 2.92W
问题详情：
单项选择
As a professional basketball player，he is serious ________ playing basketball.
A．about B．at
C．of D．to
【回答】
A 点拨：be serious about doing sth.为习惯表达，意为“对做某事是认真的”。
知识点：介词和介词短语
题型：选择题
