參考答案及解析:
1.While—When或After.本句的this指代的是to change the weather by using magic. when/after 引導時間狀語
2.in—than.earlier是early的比較級,其后應有than
3.those之后加who.who引導定語從句
4. 刪除advance前的the.in advance為習語
5. take—have.have connection with 為習語
6. controlled—controlling或在controlled前加that/which.controlling the weather 或that/which controlled the weather做定語修飾the actual factors
7. and—or.rain和draught只能是二者之一
8. 刪除is.與上文平衡,均為省略句
9. before—when/if.條件句
10. will—would.if引導的是條件句用的是remained一般過去時
n. 干旱