______ on-going division between English-speaking Canadian and French- speaking Canadians is ______ major concern of the country.
| A.The; 不填 | B.The; a | C.An; the | D.An; 不填 | 
—Would you like to join me for a quick lunch before class?
 —________,but I promised Nancy to go out with her.
| A.I'd like to | B.I like it | 
| C.I don't | D.I will | 
In my opinion,life in the twenty-first century is much easier than ________.
| A.that used to be | B.it is used to | 
| C.it was used to | D.it used to be | 
When I handed the report to John,he said that George was the person ________.
| A.to send | B.for sending it | 
| C.to send it to | D.for sending it to | 
It is said in Australia there is more land than the government knows ________.
| A.it what to do with | B.what to do it with | 
| C.what to do with it | D.to do what with it | 
I like getting up very early in summer.The morning air is so good ________.
| A.to be breathed | B.to breathe | 
| C.breathing | D.being breathed |