问题补充：
--Our English teacher is back home from Britain now.
--Yes, she there for just three months.
A. has been
B. had been
C. is
D. was
答案：
A. has been
B. had been
C. is
D. was
解析：考查时态：句意：--我们的英语老师现在从英国回来了。--是，她在那里呆了三个月。可知现在回来了，在英国的三个月是过去的时间。用一般过去时，选D。
