---Do you allow your kids go out alone at night? ---_____. They are not old enough.
A study shows that people _____ get medical advice from the Web actually get worse.
Neither Join nor I ______able to persuade Richard’s grandfather to attend the wedding.
My dictionary has disappeared. Who ________ have taken it?
I looked under ______ bed and found _____ book I lost last week.
--- How long are you staying? --- I don’t know. _____.