b. 2. Not until two hours later did the plane finally take off.
3. Rarely have I seen such breathtaking countryside.
4. Not only was she well dressed,...
5. Hardly had I switched on my laptop when ...
6. Not until we got home did we realize (that) we had been robbed.
7.Only when you go abroad can you understand your own country.
8. No sooner had we found our seats than the show started.