________is no doubt that today greenhouse gases are the largest human influence on global climate.
The group of research workers are said to ________ to the dangerous nuclear radiation while they carried out their rescue task.
______ all the international effort being made, we have to have faith that there will be solutions _______ time to stop epidemics and poverty.
--- Fancy meeting you here!--- Pleased to see you. If they ________ me to the party, I ________ be here.
Michael Jackson gained popularity at a time when MTV was establishing _____ as a creative force.
How did it ________ that everyone knows my decision? I had been keeping the information to myself.