Although cats can not see in complete darkness, their eyes are much more ______ to light than human eyes.
It won't work.________,it's a bad idea,and secondly it'll cost too much.
His parents ________him to give up the plan for the outing this weekend because of the bad weather but he just wouldn't listen.
On no account ________to our plan for the trip.
Though they met for the first time,they talked ________they had been good friends.
The incident ________ a chain of events which resulted in the outbreak of World War I.