中 * * 党在处理西安事变和皖南事变的策略方针上有何区别？
参考答案：区别：西安事变和平解决，皖南事变采取坚决回击。
By the end of last year they _____ thousands of orange trees on the mountains. [ ]
A. had planted
B. have planted
C. were planting
D. would plant
请写出下列单词所缺字母。
1. he___d 2. c___t 3. d___sk 4. teac___er 5. tre___
6. bl___ck 7. welc___me 8. sist___r 9. eleve___ 10. factor___
