An old friend from California called from the airport to tell me that he had arrived. I was not able to leave the office, but I had made plans for his arrival. After explaining where my new house was, I told him that I had left the key under the doormat (门垫). Since I knew it would be pretty late before I could get home, I suggested that he make himself at home and help himself to anything that was in the refrigerator.
Two hours later my friend phoned me from the house. At the moment, he said, he was listening to some of my records after having had a delicious meal. Now, he said, he was drinking a glass of orange juice. When I asked him if he had had any difficulty finding the house, he answered that the only problem was that he had not been able to find the key under the doormat, but luckily, the living room window by the apple tree had been left open and he had climbed in through the window. I listened to all this in great surprise. There is no apple tree outside my window, but there is one by the living room window of my next door neighbor's house!
An old friend of mine called ______.

A．to tell me to meet him at the airport

B．to tell me about his arrival

C．to ask me to leave the office

D．to ask me to make plans for his arrival

My friend climbed into the room because ______ .

A．there was an apple tree outside

B．the living room window was left open

C．he had difficulty opening the door

D．he hadn't found the key

My friend telephoned me two hours later ______ .

A．from my home	B．at the airport
C．in his office	D．from my neighbor's house