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
The students found _______ easy to work out this maths problem.
New York is bigger than __________ in Australia.
We all think we are tired after the long work. Let,s stopa rest.
My aunt arrivedGuangzhouthe morning of March 13.
Robots(机器人)are to do the same thingspeople.