Is it true that Jack_______— Exactly He damaged a very expensivemachine

It is _______ difficult work that he isn’t able to do it _______.

It was so noisy out side that he couldn’t down to read.

That black T-shirt with Yao Ming’spicture on it ___belong to David. He admires him a lot.—No, it _____ be his. He hates blackcolour.

Mr Wang’s lessons are _____, so his students like him very much.