According to a new study by a British university , learning second language can lead to increase in your brain power .
—He has two brothers and three sisters. Do you know ________ of them? —No, I know ________ of them.
—Did ________ of your parents come to attend the opening ceremony? — ________ of them came.
—Johnson, there’re a lot of chairs over there. Go and fetch ________ for me. —Why ________ ? Mike is sitting there doing nothing.
Do you really believe that Mr White has blamed us for the accident,especially ________ ?
— May I speak to Mary? — This is ________ speaking.