问题
单项选择题
People today spend a () portion of their time conferring on the proper way to bring up children.
A. considerable
B. significant
C. substantial
D. surplus
答案
参考答案：A
解析：
considerable“相当多的”；significant“有意义的”；substantial“实质的；真实的；结实的”；surplus“剩余的”。