.To greatly raise people’s living conditions, _______.
It is uncertain _______ side effect the medicine will bring about,although about two thousand patients have taken it.
Children who are not active or ______ diet is high in fat will gain weight quickly.
People were perhaps more honest a long time ago when life was very different from _________ it is today.
How can he get the job? He didn’t even ________ it.
A poet and artist _____ coming to speak to us about Chinese literature and painting tomorrow afternoon.