Putting an index finger up to the lips is a popular way _____ Be quiet

来源:百度知道 编辑:UC知道 时间:2024/05/04 09:49:36
to say
for saying
of saying
of say

of saying

以下供参考:

American ways of living
美国人的生活方式

Putting a index finger up to the lips is a popular way to say Be quiet.

可是我认为填saying就得了,我认为它其实就是省略了:a popular way that/which is saying

of saying