---Is it my age ____the boss minds?---I'm afraid so.He will consider ______ necessary to ave an wxperienced assistant.
--what do you think of the film? ---_____?
Is ____ dangerous to swim in the river alone?
--___do you clean the reading room? ---Every two or three days.
Jane goes to Paris to spend her holiday ____.
–He is a doctor and his brother is a doctor, too. –You mean both he and his brother________ doctors, right?