单项选择题

Long before children are able to speak a language, （）communicate through facial expressions and by making noises.

A．however
B．they
C．furthermore
D．who

相关考题

An investigation was made into the accident, （）five peo...

单项选择题An investigation was made into the accident, （）five people were killed.

A．where
B．for that
C．when
D．in which