题目
It was not ________ she took off her dark glasses ________ I realized she was a famous film star．A. when; thatB. until; thatC. until; whenD. when; then
It was not ________ she took off her dark glasses ________ I realized she was a famous film star．
A. when; that
B. until; that
C. until; when
D. when; then
题目解答
答案
B. until; that
解析
本题考查强调句型的用法。关键点在于识别被强调的部分是时间状语从句，且原句结构为"not until..."。解题核心在于：
- 强调句型的基本结构：
It is/was + 被强调部分 + that/who... - "not until"结构在强调句中的固定搭配：
until引导时间状语，后接that。
原句可还原为：
I didn't realize she was a famous film star until she took off her dark glasses.
被强调部分为not until she took off her dark glasses（时间状语），因此需用强调句型。
选项分析：
- A. when; that：
when不能与not until搭配，错误。 - B. until; that：符合强调句型中
until引导时间状语，后接that，正确。 - C. until; when：
when不能用于强调句型的第二空，错误。 - D. when; then：
then不符合强调句型结构，错误。