It was not _______ she took off her sunglasses _____ I realized she was a famous film star.
A、when; that
B、until; that
C、until; when
D、when; then
【正确答案】：B
【题目解析】：选B .这是not until 的强调句型,强调句就是It is + 强调部分（人,物,地点,时间等） + that / who / where 等.所以此句为It was not until she took off her sunglasses that I realized she ...
