You can come here to ask me ________ if you have any questions.
.Cleanig woman in big cities usually get ______by the hour.
What worried the child most was ____to visit his mother in the hospital .
Acomputer does only what thinking people _______.
.I’v worked with children before ,so I know what ______in my new job.
The purpose of new technologies in to make life easier, _______it more difficult.