完形填空

　　After the Second World War, there were many reports of mysterious (神秘的) “flying saucers (碟子)”. They 1 throughout the world. For quite a long time strange shapes had been reported in 2 parts of the world, but it was not until recent times that these were seriously studied. Pictures and films 3 of flying saucers, or UFOs seen in the sky. Some pilots of 4 reported that round flying machines had followed 5 , and moved at great speeds. Some unofficial (非官方的) experts and 6 suggested that some creatures (生物) from other planets were watching us. Some reports said a UFO had 7 theearth. A space creature 8 the. UFO and moved around, then flew off again. But none of the landings was ever proved (被证实) to be true.

　　What lies ahead of us (我们的前景如何)? We do not know. 9 we can be sure that whatever happens, we are living in an age which will grow steadily (稳定地，逐渐地) 10 .