After several campus attacks,many schools across the country have already taken action____接上thier campuses-----A.making,safe B.made,safe C.to make D.make,safe

After several campus attacks,many schools across the country have already taken action to maketheir campuses safer.为什么用 to make/ safer After several campus attacks,many schools across the country have already taken action____接上thier campuses-----A.making,safe B.made,safe C.to make D.make,safe campus see you after several months 的意思 several several several several several you will leave the university after several months,come on After a silence of several minutes为什么要用a? After several years’ hard working,he achieves success/his ambition. 英语翻译after several precipitations in ethanol to remove free dye After telling several of his friends about the theft!此句话中 several of his friends 是怎么回事为什么不写成 his several friends 或者several his friends呢 campus-bound campus是什么意思 campus是什么意思? campus中文翻译