English Passage用所给动词的适当形式填空,使短文通顺、完整.必要时可加助动词或情态动词.It's some

English Passage
用所给动词的适当形式填空,使短文通顺、完整.必要时可加助动词或情态动词.
It's sometimes (1)____(report) that strange objects (2)____(see) high up in the sky.These unidentified flying objects(UFOs)(3)____(make) a lot of people interested.Some of the reports about them are difficult (4)____(believe).Some have been explained in scientific ways,and others have never been explained.
It is not easy to decide whether a report is true or not.One report of UFOs (5)____(come) from a British plane on its way from New York to London in1954.The British plane (6)____(fly) over an island at 19,000 feet when the captain (7)____(notice) that sometiang was on their left and a little lower than their plane.It was about five miles away.
"It was not one object but several," the captain said."We (8)____(see)one large and six small objects.I sent radio message to report about this and I received the answer that the other planes (9)____(come) out to meet us.Before the planes arrived,the smaller objects entered the larger one.The large object then became smaller and (10)____(move) away fast."
这是"新目标九年级英语Unit 5"的练习题。
不是课本上的练习题。