阅读对话，判断正误，用“√”“×”表示。

A: Come here, Helen. What's that on the desk?    

B: It's a clock,

A: What's the time?                        

B: It's seven o'clock.

A: It's time to go to school.                  

B: OK. Let's go by bike.

(     )1. It's a clock on the desk. 

(     )2. It's six o'clock.

(     )3. It's time to go to school.    

(     )4. Let's go to school by bike.

现有磁盘文件filea.txt和fileb.txt，各存放一行字母，上述程序实现了将2个磁盘文件中的内容合并，并按照字母的升序排列，存放到一个新的文件new.txt中。请将程序补充完整。 注意：不改动程序结构，不得增行或删行。 package ch3; import java.util.*; import java.io．*; public class ex3 { public static void main(String[] args) {String s="";try{ RandomAccessFile f1= new RandomAccessFile("ch3/filea.txt","rw"); ______f2=new ______("ch3/fileb.txt","rw"); s=f1.readLine()+f2.readLine(); char c[]=s.toCharArray(); Arrays.sort(c); ______Out=new______("ch3/new.txt"); for(int i=0;i＜c.length;i++) { Out.______(c[i]); } out.______; f1.close(); f2.close();}catch(I0Exception ioe){ ioe.printStackTrace();} } }