根据句意或中英文注释，在相应的横线上写出单词的正确形式。（5小题*1=5分）
There are several          (字典) on the shelf. You can choose one.
Can you answer the question      (正确) at once when the teacher asks you?
The air is            (新鲜的) because there are lots of trees around here.
English Classroom is an _______(education) program on CCTV.
The audience           (鼓掌) at the end of the dancing competition because they enjoyed it very much.