He argued _______ smoking, and insisted that it was ________ argument that smoking was harmful to health.

He usually ______20 hours every day.

The man in a black suit _______ be our youth worker.—It _______ be him. I saw him in the classroom building some minutes ago.

Jake _____his key in the office so he had to wait until his wife _______ home.

Lucy, what about going camping if it_____ tomorrow? — Sounds great! [ ]