Food safety is important. Rules to stop people from food pollution.
Don’t get off the bus ________it has stopped.
Who can ________ a better idea to increase sales?
This is the ________ time in ________ days that Tommy has come to school late.
The hotel will ________ breakfast, but we will have to go out for lunch and dinner.
—How many computers are there in the room? —________.Some workers moved them to another place just now.