Mum, 1 am hungry. May 1 have some______—Of course. But don’t eat too much.

Bob promises to join in the football match ________ hehas to help his parents on the farm.

.The subway timetables are well planned in Norway. Seldom ________ wait very long.

________ does Kate chat online with her friends —- Twice a week.

ities issued a warning of airpollution for PM-2.5 readings, which becameConcern of all the people