______ these pictures, I couldn't help thinking of those days when I was in Beijing and ______ from the top of a thirty-storeyed building, Beijing looks more beautiful.
________ at the party, I found Tina seated alone in the front row.
--- Do you mind if I record your lecture? --- ________. Go ahead.
My chest _______ when I make a deep breath, doctor.
--- How can I use i Phone 5s? --- Just refer to the _________.
What I need is book that contains ABC of oil painting.