单词拼写。 1. I have no idea of the ________ (平均) size of classes in the UK. 2. Great changes have taken place in our country ________ (近来). 3. Good ________ (准备) should be made before we have the important meeting. 4. Don't feel e_________ about being different from others. 5. I would p________ playing outdoors to watching TV at home. 6. ________ (注意力集中) more on your work or you will be fired. 7. I found it difficult to keep my b________ on the icy road. 8. She performed the most c________ task without a mistake. 9. I'm learning German, but I still can't speak it p________. 10. Children should be encouraged to be i________ thinkers.