题目内容：

it was not ___she took off her sunglasses ____i realized she was a famous film star
a.when that
b.until taht
c.until when
d.when then
哪个对,关键是其他3个分别错在哪?

优质解答

选B（你那个taht应该是that）.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 ...