1.His few personal belongings made it possible for him to move from place to place___.
A.in ease B.at ease C.with ease D.with easiness
答案是C 我想知道A和D词组的意思
2.They are ___students that they all performed well in the notionwide examinations.
A.so dilifent B.such diligent C.so much diligent D.such very diligent
答案是B 为什么D不可以
3.The manager of the company sent me a fax saying that he would visit us ___next spring.
A, some time B.sometime C.sometimes D. some times
答案是B 这几个选项的区别是什么~thx