Continental glaciers ____ today in Antarctica and Greenland.
A exist B that exist C existing D where they exist
选什么,为什么?
Is he studying for an exam?
Yes,he is ____ it next week.
A doing B to take C making D to give
选什么,问什么?
初学,我怀疑答案错了,知道的朋友帮助下.
看好,关键是为什么,别光说答案.