The great scientist became world-known in the early 1970s,______ he and another scientist made new discoveries about black holes.
| A．which | B．where | C．when | D．then |
She is ________ new comer to ________ physics but she has made some useful inventions already
| A．the, the | B．the, / | C．a, / | D．a, the |
When you finish reading the book, you will have ________ better understanding of ________ life
| A．a; the | B．the; a | C．/; the | D．a; / |
For a long time they walked without saying ________ word Jim was the first to break ________ silence
| A．the;a | B．a;the | C．a;/ | D．the;/ |
________ on-going division between English-speaking Canadians and French-speaking Canadians is ________ major concern of the country
| A．The, / | B．The, a | C．An, the | D．An, / |
I was attracted by ________ most unusual picture made of ________ bits of coloured plastic
| A．a…/ | B．/…/ | C．a…the | D．the…the |