There's no way of knowing why the man fails,____ he is always hard-working and wise.
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.
There are forty students in Class Four. And of them girls.
The Greens left London a sunny morning.