阅读理解。
An old friend from California was going to spend a few days with me. He called me from the station to
tell me that he had arrived. I wasn't able to leave the office, but I had got ready for his visit. I told him where
my new house was and that I had left the key under the doormat (门垫). Because I knew it would be very
late before I could get home, I asked him to make himself at home and help himself to anything in the fridge.
Two hours later, my friend phoned me from the house. At the moment he said he was listening to some
music after a nice meal. He had found two fried eggs, and had helped himself to some cold chicken in the
fridge. Now he said he was drinking a glass of orange and he wished me to go back soon. When I asked him
if he had any trouble in finding the house, he answered he didn't find the key under the doormat. But the
window by the apple tree was open and he climbed in through the window. I listened to this in surprise.
There was no apple tree outside my window at all. But there is one by the window of my next door neighbor's
house!
1. The writer left the key under the doormat for _______.
A. his uncle
B. himself
C. his friend
D. his children
2. The writer told his friend to look after himself before he got home because _______.
A. he would get home very late.
B. his friend would stay with him for a few days.
C. his friend would not mind that.
D. he would not be able to return home that day.
3. His friend told him on the phone that _______.
A. he found the house without any trouble.
B. he enjoyed himself very much in the house.
C. he found the key very easily.
D. he liked his new house.
4. How did the writer's friend come into the house?
A. He used the key to open the door.
B. He got in easily because the door was open.
C. He got in through the window.
D. He knocked at the door.
5. Which of the followings is right?
A. The writer's friend went into the wrong house.
B. The writer's friend liked the neighbor's house.
C. The writer's house was easy to find.
D. The window of the writer's room was open.
要使其中第一个窗体中的第一个命令按钮来控制显示第二个窗体，第二个命令按钮用来结束程序的运行(两个按钮名称为Command1和Command2)。则以下选项中，对这两个命令按钮编写的事件过程正确的是