If parents never expect their children to be helpful at home，they are sure________.
| A．not | B．not to | C．not to be | D．not to be that |
By the time Jack returned home from England, his son _____from college.
| A．graduated | B．has graduated | C．had been | D．had graduated |
Those successful deaf dancers think that dancing is an activity _____ sight matters more than hearing.
| A．when | B．whose | C．which | D．where |
______ many times，he finally understood it．
| A．Told | B．Telling |
| C．Having told | D．Having been told |
I was still sleeping when the fire _______, and then it spread quickly.
| A．put out | B．broke out | C．came out | D．got out |
People have always been_______ about exactly how life on earth began.
| A．curious | B．excited | C．anxious | D．careful |