题目

完形填空  通读全文，理解大意，从各题所给的选项中选择可填入短文的最佳选项    It must have been about two in the morning when I returned home. I tried to   1   my wife by ringing the door-bell, but she was very deeply asleep. So I got a ladder from the shed in the garden, put it against the wall, and began climbing towards the bedroom  2  .I was almost there when a sarcastic voice below said, I don't think the windows need cleaning at this time of the night.” I   3   and nearly fell off the ladder when I saw a policeman.  I enjoy   4   at n下列生物中，能产生抗生素的是（　　）A.酵母菌B.青霉菌C.蘑菇D.肺炎球菌