If I had closed the window, the cat _____________ out.

London’s nothing like it ________!

Choose the word that is closest in meaning to the underlined word. 3D printing continues to hold great promise for a wide range of industries, but due to cost and its still limited functionality, it remains greater in theory than in practice.

With reference _____ your order, I confirm that we have sent the goods to you. 

Choose the word that is closest in meaning to the underlined word. When you think of “scientific breakthroughs,” you probably think of the major, history-shifting ones. Newton’s laws of gravity! Einstein’s theory of relativity! Penicillin!

Life is hard for ________.

By the end of the week I _______ here for four months.

Where _____ between 2005 and 2007?

Choose the word that is closest in meaning to the underlined word. It’s unlikely the cure for cancer will come around in 2019, but we will likely see developments in immunotherapy—a biological treatment that uses the body’s own immune system to fight cancer.

You _____ spanked her. She didn’t deserve it.