—Kevin, you look worried. Anything wrong?—Well, I __________ a test and I'm waiting for the result.
—I want to know _____ makes you a successful director. —I worked as a secretary for five years,_______contributes a lot to my today’s work.
The color green ________ spring, which is the time of year when things in nature start to grow after a long winter.
Everybody has the responsibility to save water, if future generations are to enjoy a similar standard of living to ________ we enjoy now.
Corruption is a problem in countries across the world, with developing countries often _________ more serious, although there is no evidence to suggest this is the case.
________ fuel supplies being finite and many people being wasteful, we will have to install some type of solar heating device in our home.