防火防烟卷帘的导轨应设置防烟装置，防烟装置的材料应选用()。
A、不燃材料
B、难燃材料
C、可燃材料
D、不燃或难燃材料
参考答案：D
根据句意和首字母填写单词。
1. The girl is b____. She can't see anything.
2. The dog is d____. It can't hear anything.
3. It is my p____ to be with you.
4. Can you i____ how well she played the guitar?
5. The woman has got a s____ trained dog.
The man as well as his horse ________ crossed the river ________ from Tokyo.[ ]
A. which; come
B. that; comes
C. who; came
D. who; come
