A Korean survey shows that shopping cart handles are the most bacteria-carrying items among some ________used objects.

I hate interruptions, _____when I ’m concentrating on my study.

He had planned to make a compromise，but        he changed his mind at the last minute. 

–This summer is very hot. --Yes, but it’s not __________ as hot as last summer.

My mother has not yet recovered from the illness, but she is __________ getting better.