—Did you spend a lot of time looking for the lost child?—________. It took us half a month, but luckily we found him.
There is no simple answer, _____ is often the case in science.
Finally he reached a lonely island _________ was completely cut off from the outside world.
He wrote a letter ______ he explains what had happened in the accident.
The president of the World Bank says he has a passion for China, ______ he remembers starting as early as his childhood.
Happiness and success often come to those ________ are good at recognizing their own strengths.