23. Knowing office rules — whether _______ or not—is critical, especially for young job seekers.
If you want to avoid the risks of passive smoking, you can ask the smoker not to __________ in front of you.
Although she is pretending hard to be young, grey hair and the lines on her face __________.
When asked to explain __________ he did to make his students so fascinated with his lessons, the teacher paused and thought deeply.
The news has spread all over the country __________ the spaceship succeeded in returning to the earth.
-How did you find the film The Flowers of War? -It's very moving. I couldn't __________ my tears.