I hope you don’t mind me asking, ____ where did you buy these books?
Not all the patents________ have been recognized.
Unless______, this law will make life difficult for farmers.
This year many factories raised the prices of clothes to _____ the higher cost to customers.
Before the operation, the doctor had to talk to the patient in order to remove her fear________ she might die during the operation.
— How about dinner tonight? It's on me.— ______ .