__________ is known to everyone, the moon travels round the earth once every month.
| A．It | B．As | C．That | D．What |
Her dog ran out of the yard the old lady opened the gate .
| A．moment | B．a moment | C．the moment | D．that moment |
I always regret notharder when I was young .
| A．studying | B．having studied | C．to study | D．to have studied |
Catherine is one of the brightest students who from the Department of Computer Science , Brown University .
| A．is graduated | B．has graduated | C．are graduated | D．have graduated |
The belief that the children of working mothers usually suffer isby most scientists.
| A．rejected | B．refused | C．resisted | D．reduced |
Something about his manner suggested that he not interested in what we were doing .
| A．was | B．were | C．be | D．is |