问题补充：
Thank you for your visit to . This site and will be back online in the not—too—distant future.
A. had updated
B. will be updated
C. updated
D. is being updated
答案：
A. had updated
B. will be updated
C. updated
(答案→)D. is being updated
解析：本题考查的是动词时态的用法。此处的现在进行时态表示的是不断发展变化，同时又是被动的。
