A:4
B:5
C:6
D:7
人类双眼皮为显性,单眼皮为隐性.某年轻夫妇均为单眼皮,生了一个单眼皮的女孩.后来母亲去美容院通过外科手术变成双眼皮,该夫妇如果再生一个孩子是双眼皮的机率为( )
用方框中所给单词的适当形式填空。
suit patient practice hard-working care
They solved the problem in the end. Yet I really don't know .