The author of the report is well _____ with the problems in the hospital because he has been working there for many years.
The children all turned ________ the famous actress as she entered the classroom.
The government plans to bring in new laws ________ parents to take more responsibility for the education of their children.
________ the right kind of training,these teenage soccer players may one day grow the international stars.
Please do me a favor—________ my friend Mr.Smith to Youth Theater at 7:30 tonight.
Nowadays people sometimes separate their waste to make it easier for it ________.