most children nowadays are the only children, they tend to be more self­cent

________ most children nowadays are the only children, they tend to be more self­centered.

A．Ever since  B．Now that

C．Only if  D．Even though

试题答案

B　考查状语从句的连接词。此处now that意为：既然。句意：因为当今大多数孩子是独生子，所以他们更加自我。