So hard-working _____ that he sets a good example to all the other classmates.
| A．he is | B．is he | C．does he | D．he does |
My father and his teacher talked a lot about the things and persons ___ they could remember.
| A．who | B．which | C．what | D．that |
About ________ of the workers in that steel factory_______ young people.
| A．third-fifths ; are | B．three-fifths ; are | C．three-fives ; is | D．three-fifth ; is |
What an important part the Internet_______ in our life! One can hardly imagine____ life would be like without it.
| A．has; how | B．is; however | C．uses; what | D．plays; what |
When the woman found her borrowed valuable necklace (项链) ______, she felt______ the world was at an end.
| A．was missing; unless | B．was lost; as if | C．was missed; whether | D．was gone; as if |
______ he has made a decision, it is not easy for you to make him change his mind.
| A．Though | B．Unless | C．Until | D．Once |