两道英语句型转换题
问题描述：
两道英语句型转换题
1.students will learn two foreign languages if it is necessary.
-students will learn two foreign languages _________.
2.please announce to your class that there will be no school tomorrow.
-please _____________to your class that there will be no school tomorrow.
答
1.if necessary
2.make it announced
第一个可以肯定
第二个不保准
话说,句型转换是啥意思?第二个可以用相似词组替换吗?