The book A Short Guide to Great Britain , which you sent me before I went abroad , offered me ______ guide.I am really thankful.

I was riding along the street and all of a sudden, a car cut in and knocked me down——You can never be _____careful in the street

u lose the paper document, sign in www.Sina.com, __ you might download all you need.

I’ll spend the evening ______ in your room waiting for the thief to arrive.

out ______lecture you attended last night—It was too boring , indeed ,____lecture for me.