It’s the sort of work that a high level of concentration.
—Can I run around here? —______. Don’t you know the school rules?
—Which seat shall I take? —Please take ______ seat you like.
After breakfast, little Tony went to school by bicycle as ______.
Children are always curious ______ the unknown world.
It is believed that if an event is ______, it will surely ______ the readers of the paper.