He wondered if he could slip out of the lecture hall without anyone______.

We worked all night, _____ for the coming procession. 

Anxiously, she took the dress out of the package and tried it on, only _________ id didn’t fit

A sheep_______on this kind of special grass usually grows much faster than_______on ordinary (普通的).

Nobody but doctors and those _______ by Dr Smith ______ to enter the patient’s room.