When he got off the bus,it happend_B_.

When he got off the bus,it happend_B_.
A to rain B to be raining C raining D to raining2._C_from the moon,the earth with water__seventy percent of its surface appears as"a blue ball" 为什么?A seen;coverd B .seing;covering C.seen;covering D to see;to cover3.We walked as fast as we could ,__to get there on timeA hoping B to hope C hoped D being hoped 为什么不是A4.They knew him very well.They had seen him__up from childhoodA grow B grew C was growing D to grow 什么不是D5.The examination was so difficult that almost everybody failed__it.A in passing B to pass C to have passed D passing为什么不是A?6.__into many languages,but with quite a long historyA being translated B having translated C to be translated D having been translated为什么是D?7.Travelling is __,but we usually feel__when we are back home from travel.A interesting;tired B interested;tiring C interesting;tiring D interested;tired?8.Althouh she saw so many people_in front of her,she looked calmAsiting B seating C sit D seated9.__for many years,nobody could recognize him.A put in prison B the man putting in prison C the man having been put in prisonD the man being put in prison?10.She is a well-known wrier and speaker.She devoted all her life__.A to write and lecturing B to writing and lecuing C to write and lecture D writing and lecturing.11.The doctors did everything they__save the__old woman but failedA could;dead B could to;dead C could;dying D could to;dying抄自成人高考高起点解题指导~希望能讲解一下.

1.happen to do sth 在A. B中排除,而用的是when,表示在那个时间点,应该用现在进行时,选B
2.选A,意思是从月球上看,地球表面的水覆盖率是70%看起来像个蓝色的球.两个句子的主语应该都是the earth,第一句地球应该是被看到,be seen,第二句cover是用过去分词做定语修饰water 3.选B是因为这算是一连串的同类词,比如说,I went to the supermarket,bought some bread,and weent home.用的就是同一个时态.
4.应该是A.see有两种用法,see sb. do表示看到某人一直在做什么或存在的一种状态或see sb. doing表示看到某人正在做什么,这里是看者他长大,是个过程
5.选B吧,fail有两种方法,一是fail in sth接名词,比如fail in the examination,另外一种是fail to do sth
6.我也搞不懂
7.选A 正常形容人是-ed形式,形容物用-ing
8.选A 理由同第四题
9.选C吧,是独立主格结
10.选B devote to doing sth
11.选D do everything they could to 意思是尽一切努力去做,dying 表示快死的 而dead 表示“死的”
希望能帮到你·····