Not for a moment ______ that this disease was caused by certain virus.
Maybe you have travelled to many parts of the world, but nowhere else _____ striking attractions.
Sometimes I can’t help wondering what’s the matter with Tom.I can’t stand it that he often_____ me and talks with the other students around him.
______ these models several were exciting, ____ of them exactly right.
—Did you reach the top of the mountain?—Yes. Even I myself didn’t believe I could it.
His aunt’s letters him of those beautiful days when they used to live together in his hometown.