问题
单项选择题
Because American parents believe that knowledge leads to a meaningful life, they try to give youngsters many opportunities to develop skills and ______ interests.
A．worth
B．worthy
C．valuable
D．worthwhile
答案
参考答案：D
解析：worthwhile“值得花时间(精力)的”；worth为介词，后接动名词或名词；worthy“有价值的”，常作表语；valuable“值钱的，贵重的”。