While we were running on the playground, Jack suddenly stopped ________and lay on the ground,so we all stopped ________what was wrong with him.A.to run;to seeB.running;seeingC.running;to see
-----He’s never been to Canada before, _____? -----Sorry, I don’t know.
---What he enjoys __________great and interesting. ---Yes, but it’s dangerous.
-----Sam, there is only _____ at home. -----Don’t worry. I’ll go to the supermarket and get _____ this afternoon.
The life we were used to ______ greatly since 1980.
_______useful the information he gave us is !