John promised his doctor he________not smoke, and he has never smoked ever since. [ ]

y, the old man was sent to the hospital intime. Three minutes later and he _______.

The singer and the dancer _____come to Beijing.

I spent two weeks in London last summer. — Then you must have visited the British Museum during your stay, _______ you?

Knowledge and learning are important if we want to be successful, but they may also ______ our thinking.[ ]