99.The chairman thought___________necessary to invite Professor Smith to speak at the meeting .
I thought the girl nice,pretty and honest ________ I met her.
Nowadays,scientists are working hard to find a best way of treating addictions ________ drugs.
It was so ________ having to sing in public.
—Did you look up the time of trains to Shanghai? —Yes,the early train is ________ to leave at 5:30 am.
—My uncle suggests I ________abroad. — I would rather you ________at home.