Nowadays, more and more young couples are childless（ ）choice.
A、
with
B、
by
C、
out of
D、
because of
【正确答案】：B
【题目解析】：
by choice：出于选择，这是固定搭配，选B。句意：如今，越来越多的年轻夫妇选择不要孩子。
Nowadays, more and more young couples are childless（ ）choice.
Nowadays, more and more young couples are childless（ ）choice.
with
by
out of
because of
by choice：出于选择，这是固定搭配，选B。句意：如今，越来越多的年轻夫妇选择不要孩子。