The__________ that there is life on other planets in the universe has always inspired scientists to explore the outer space.
advice
order
possibility
invitation
—I wonder how much you charge for your services. —The first two are free the third costs $30.
It is hard for the Greek government to get over the present difficulties_________ gets more financial support from the European Union.
------ Our holiday cost a lot of money. ------ Did it? Well, that doesn’t matter ______ you enjoyed yourselves.
I was so familiar with her that I recognized her voice ______ I picked up the phone.
You have to wear a helmet and a life jacket for protection, just ___ you fall into the water. A. in case C. unless C. though D. As