He climbed silently______seizing the thief______.
I wish to thank your student Tom, without ______ rescue couldn’t have been offered to my drowning son so soon.
______ others in the reading room, Jack walked in on tiptoes.
He suggests the number of cars should be limited to stop air pollution. ______, the idea is not very practical.
—Why do you know so much about The Youth Olympic Games to be held in Nanjing?—Well, the media ______ it in a variety of forms.
Much to my surprise, I found the education system of the USA was totally different from ______ of my home country.