The fans were told that all the tickets had been sold out, ________they had waited outside the booking office for so long.
| A．as | B．since |
| C．unless | D．though |
____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, / |
When he left _____college ,he got a job as ______reporter in a newspaper office .
A. /, a B /, the C. a, the D. the,, the
The most important thing about cotton in history is ___part that it played in ____Industrial Revolution.
| A．/,/ | B．the,/ | C．the , the | D．a ,the |
While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
| A．a ,/ | B．a ,the | C．/, the | D．the ,a |
It is ___world of wonders, _____world where anything can happen.
| A．a. the | B．a, a | C．the, a | D．/,/ |