We took mother to all the best hospitals we could find, but all our efforts were in
来源 :焚题库 2021-12-07
中单选题We took mother to all the best hospitals we could find, but all our efforts were in ；she passed away last month.
A.valid
B.vain
C.vacant
D.vague
参考答案：B
答案解析：这句话的意思是：我们带母亲去了我们能找到的所有最好的医院，但是一切努力都是徒劳的，她上个月去世了。vain意为“无益的、徒然的”；valid意为“有效的、有充分根据的”；vacant意为“空的、未被占用的”；vague意为“不清楚的、含糊的、茫然的”。根据句意，选项B为正确答案。
