________ there is no restriction on foreign entries at the film festival ,those that win are in minority. A. unless B. When C Where D while
—I really don’t know how to thank you enough.— .
On our way to school, suddenly it began to rain, and we hurried to take______under a big tree.
I can still remember that it is since the 1990’s, _____ we began to use cell phones,_______ the number of mobile users has greatly increased.
—I can never forget the day ___ we spent together in the summer camp.—Well, especially the day _______it suddenly began to rain in the middle of the night.
Every one of us must know this: _________ we live can we save the earth.