--Excuse me, teacher, can I ask you something about the last class? I didn’t quite understand it.--Sure! Please feel _________to ask me anything!
The poor boy needs his teacher _______ him.
________ bedroom is very dirty.
They are not _______ pants. _______ are under the bed.
Tom doesn’t like red pens, so he wants a blue _______.
You should ________ the flowers once a week.