问题
选择题
It is not always easy for the public to see _______ benefit a new invention can be of to human life.
A．whose
B．what
C．which
D．that
答案
答案：B
考查从句。因为benefit是一个名词，所以应该用what 说明。What benefit应该是放在be 和of之间。句意：对公众来说明白一项新发明对人类生活有什么好处是不容易的。