I’m worn out,____,the bike doesn’t work well,___ I can’t go further.

I spent the whole day repairing the car.The work was          easy.

There was such a long queue for coffee at the intervals that we __________ have to give up.

With his mother’s good care, the boy is _____ recovering from his heavy cold.

So far we have done a lot to build a low-carbon economy, but it is ____ ideal (理想). We have to work still harder.