--- Who do you think ___ the book here? --- It may be John. He was sitting here all the morning.
My daughter is really ________ Weibo these days; she spent hours on it daily.
In our daily life we have to do things ________ our own will every now and then.
Tom was over there. His red clothes stood out clearly ________ the snow.
Taking regular exercise and eating a balanced diet are two important keys ________ good health.
The Boston Marathon bombings killed 3 people, including a Chinese citizen ________ Shenyang.