He has three brothers, ________ is a doctor.
He stood up and________a smile to cover up his disappointment.
—You seemed to be very surprised at the news that he won.—Not exactly.It was his courage________his skill________really struck me.
Their daughter has________for language while their son is a________pianist.
—It’s difficult to tell this picture from that one.—Yes.The differences between the pictures are very________.
I hope the government will take more strict________against the smog that affected several big cities last winter.