(2014·银川部分中学高三联考)Only when you leave school________how much you love it.

(2014·湖南郴州五校第二次联考)Not only________to turn off the lights in the kitchen，but we also failed to lock the front door.

(2013·咸阳二模)We should keep in mind that the earth is our only home and only by saving the environment________ourselves.

(2013·湖南省重点中学3月联考)We pursue happiness，thinking one day we will find it.But_________it by seeking it.

—Serina has been watching the TV series the whole night.— ________.

Only after they had discussed the matter for several hours ________ a decision. 

 Nowhere else in the world ________ such a quiet，beautiful place.

In the dark forests ________，some large enough to hold several English towns.

Only when he reached the tea­house________it was the same place he'd been in last year. 

Jane won't join us for dinner tonight and________.

—I've just been to my first language class.—Oh，really？________.Which language are you studying?

She won't go unless________.

The waste water, when _______，should be clean enough to meet standards.

Under no circumstances _______the search far the missing plane.

 I don't like feeding the animals, but I need money, so ________.

 I have been living in the United States for 20 years, but seldom ________ so lonely as now.

 I am certain by no means ________ his word since he has promised an amount of money to the poor.

 At no time ________ the rules of the game. It was unfair to punish them.

 Only by increasing the number of doctors by 50 percent ________ properly in this hospital.

 No sooner ________ down on bed ________ the telephone rang.