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- Not until he left his home ______ to know how important the family was for him.
- Not until he questioned the manager several times ___________ that the engineer-in-chief had gone to an important meeting.
- Not until quite recently that language is closely related to culture．
- Nowhere else, as his mother told us, __________ except the cabin in the backyard.
- On no account to the teacher．
- Peter has been busy these days and seldom ____ to come over to have a chat with me.
- Polly said that he did everything ______ she could to comfort his sister who cried after being refused by Harvard.
- Remember to introduce your friend Stone to me when he arrives, ______?
- So _____ in the darkness that he didn’t dare to move an inch.
- So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard.