Of one thing I am certain _____ hard work contributes to good results.
---Where did you get to know her?--- It was in Harbin No. 3 High School ______ we studied.
He won’t want to eat it unless he’s really hungry, in ______ case he’ll eat almost anything.
Scarcely ________ ourselves in the theatre when the curtain ______ up.
The study of natural history is not something to be left to biologists. In fact, their capacity _____ the time they can spend away from their offices is very limited.
Nobody but doctors and those _______ by Dr Smith ______ to enter the patient’s room.