This is the reason _______ he gave me.
--- How can I repair it? --- Well, look at the _________.
He _____ some safety measures at the meeting for the 2010 Shanghai Expo.
In the past few years, __________much improvement in the traffic.
They became friends again that day. Until then they ______to each other for nearly two years.
The news that volunteer workers will go to homes for the aged ______now.