re your eyes so red You _______ have slept welllast night.—Yeah, I stayed up late writing a report.

The theory by Einstein was later to prove true, but at that time few people could accept it.

“ Isn’t that Tom playing basketball?” “ It ______ be; he fell off the ladder yesterday and got badly hurt.”

“Cell phone” is a

r you__________at Smith’s— Yes, I__________there for about threemonths