On Thursday Mrs. Clarke locked the door and went to the women’s club as usual.

When she came home she sensed __小题1:__ unusual. Had someone got in? The back door and the windows were all locked and there was __小题2:__ sign of forced entry. Had anything been taken? She went from room to room checking and __小题3:__ (find) her spare camera missing.

The following Thursday she went out at her usual time, but she just took a short walk in a park nearby, came home through the back door and settled down to wait and see what __小题4:__ (happen).

It was 4 o’clock __小题5:__ the front doorbell rang. Mrs. Clarke was making tea at the time. The bell rang again, and then she heard her letter-box __小题6:__ (push) open. Picking up the kettle of boiling water, she moved quietly towards the door. A piece of __小题7:__ appeared through the letter-box, and then a hand. __小题8:__ wire turned and caught around the knob （圆钮）on the door-lock. Mrs. Clarke raised the kettle and poured the water __小题9:__ the hand. A sharp cry was heard outside as the wire fell to the floor and the hand was __小题10:__ (instant) pulled back, which was followed by the sound of running feet.

所谓的燕麦细胞癌是下列何种癌症的典型细胞（）

A.肺腺癌

B.乳腺癌

C.Pancoast肿瘤

D.小细胞性未分化癌

E.鳞癌