单选题 《复合题被拆开情况》　　It was a summer evening. I was sitting by the open window, reading a 【C1】________Suddenly, I heard someone crying, "Help! Help! " It came from the tree at the other end of the yard. I【C2】________but it was too dark to see anything clearly. Almost【C3】________I heard the cry again. It【C4】________like a child, but I could not imagine what anybody would be doing in our backyard.　　I decided to go out and have a【C5】________in the yard, just【C6】________ someone was in trouble. I got a flashlight and a【C7】________and went out into the yard. 【C8】________I heard the cry. "Who’s there?" I【C9】________as I walked across the yard toward the trees. But there was no【C10】________With the help of my flashlight, I 【C11】________all over that end of the yard. There was no【C12】________of anybody or anything. I came to the conclusion that my【C13】________was playing tricks on me, probably because of the story I was reading about strange beings on the moon.　　Feeling rather【C14】________about walking around in my own backyard with a stick, I went back into the【C15】________. I had just sat down to read my book again when I was【C16】________by the cry of "Help!　　Help! " this time from right behind me. I【C17】________my book and jumped up. There, sitting on the table, was a large parrot, a bird that can copy human【C18】________! While I was out in the yard, it must have【C19】________the light in the living room and【C20】________through the open window.《问题》：【C7】