105The waters of this great lake, which is also the world’s deepest, have been ____ by waste from a chemical factory

London was a new world to me and I was find out more about it.

Please turn towards me when you____________．so that I can hear what you aresaying.

He regards that book _____ one of the worstthat he’s _____ read.

ng doesn’t ________ mean you’re happy.Sometimes, it just means that you’re strong enough to face problems.