一些英语小问题The English speech contest this year is a_____competi

一些英语小问题
The English speech contest this year is a_____competitive contest,so the participants are ______experiened students.
A most mostly B mostly most C most mostly Dmostly mosrtly
Liu Xiang is the first Chinese athlete____ a title in track event at the Olympics.
A who win B to win C won Dwinning
为什么不能用 D
Scientists have been trying to use computer to copy _____ the human brain works.
A the way B the way how C however D in that way
为什么不能用B
______ the sad news,tears came to her eyes.
A Hearing B Having heard
C When she heard D When she had heard
为什么不能用 A