________ a difficult situation, so you should send a message to him and give some advice to him .
You must follow the directions exactly, and if you should become_______ , you must take the time to go back again and read them over.
He narrowly missed being seriously hurt, if not______, by the explosion.
—Professor, do you have something _______ at this moment?— No, thanks. I’ll call you if any.
I have no one ______ me, for I am a new comer here.
We hope the building project ___will be completed as soon as possible because a lot of citizens are complaining about the noises.