英语句型转换2句 （急!）
问题描述：
英语句型转换2句 （急!）
1、It is necessary for college students to master at least one foreign language.
It is necessary _____college students ______ _______at least one foreign language.
2、He stood under the ladder and caught you when you fell,so you were not injured.
If he _____ _____ _______under the ladder and caught you when you fell,you _____ ______injured.
答
1.grasp
It is necessary for college students to grasp at least one foreign language.
2.If he had not standed under the ladder and caught you when you fell,you would be injured.