After he ________ the golf club, he has ________ a number of competitions.
It is high time that we ____ the amount of carbon dioxide in our daily life. A. reduce B reduced C will reduce D reduces
It rained that day and ___ the baseball game was called off.
It is not until the disease has progressed to AIDS ____a person begins to look sick.
It is not clear ____the effects of global warming will be.
All the scientific evidence ______ that increasing use of carbon dioxide ______ the rise of the earth’s temperature.