I spent five yuan on this pen. =" I" spent five yuan buying this pen.
_____ great fun it is to make a snowman in winter.
The flight to London was because of the heavy snow.
Tom is weak in physics. He always feels _______ before he takes a physics test.
Ann is a careful girl. She always goes over her exercises to____ there are no mistakes.
To be healthy, one must have at least _____ sleep every day.