阅读下列代码段，选出该代码段的正确文件名( )。
class A
void methodl()
System.out.println("methodl in class A")；
public class B
void method2()
System.out.println("method2 in class B")；
public static void main(String args[])
System.out.println("main in class B")；
A．java
B．class
C．class
D．java
参考答案：D
解析： Java源程序文件是以.java为后缀的，Java字节码文件以.class为后缀，而且 Java源文件中只能有一个public类，该类的名字为源文件名，程序段中类B是以public修饰的，因此源程序文件名为B.java。
| 完形填空。 | |||
| A girl named Helen in my class had a terrible accident.As she was running to the bus in order not to miss it, she slipped on some ice and fell__1__the rear wheels of the bus.She__2__the accident, but was paralyzed from the waist__3__.I went to see her, in my 13yearold mind thinking she wouldn't live__4__from then on. Over the years, I moved and didn't think__5__about Helen after that.Three years ago, in Florida, my oldest son was__6__by a car while riding his bike,__7__a terrible brain injury.__8__I was looking after him, a lady who said she was the hospital's social worker called.It was a particularly__9__ day.I burst into tears for no__10__and hung up. A short time later, a beautiful woman, in a__11__, rolled into my son's room with a box of tissues. After 16 years, I still recognized Helen.I told her__12__I was, and after we both__13__the shock of that, she began to tell me about her life.She had married, had children and gotten her degree so that she could__14__ the path for those less __15__than her.She told me that if there was anything she could give me, it would be__16__. Looking at this wonderful, giving person, I felt__17__.But I also felt the first hope I had felt since then.From this person that I thought would have no__18__of life; I learned that where there is life, there is hope.My son miraculously__19__and we moved back north, but I owe Helen a__20__that I can never repay. | |||
| ( )1.A.into ( )2.A.escaped ( )3.A.down ( )4.A.normally ( )5.A.many ( )6.A.collapsed ( )7.A.making ( )8.A.Before ( )9.A.forgettable ( )10.A.reason ( )11.A.coat ( )12.A.how ( )13.A.got across ( )14.A.build ( )15.A.fortunate ( )16.A.hope ( )17.A.confident ( )18.A.quantity ( )19.A.worsened ( )20.A.life | B．over B．resisted B．up B．comfortably B．much B．driven B．causing B．While B．tiring B．excuse B．suit B．where B．got off B．smooth B．money B．dream B．selfish B．way B．recovered B．bill | C．under C．sacrificed C．in C．seriously C．less C．drawn C．resulting C．After C．trying C．matter C．wheelchair C．what C．got out C．take C．powerful C．fancy C．small C．quality C．disappeared C．success | D．onto D．survived D．out D．optimistically D．little D．hit D．leading D．Since D．unconscious D．account D．hurry D．who D．got through D．follow D．wealthy D．ideal D．depressed D．standard D．overcame D．debt |