1.   And yet he knew that Anne would find such an answer to her unanswerable question inadequate and unsatisfying.

2.   Exactly what form the industrial action will take is not yet known.

3.   In the case of the visual cortex, no one knows yet.

4.   No one knows yet what effects genetically modified foods will have on the environment.

5.   One of the problems in analyzing the situation is that we do not yet know the entire picture in detail.

6.   One week the algae could be clear of toxins and the next week very toxic but no one yet know why.

7.   Since the inflorescence is not yet known, the plant is propagated only from dormant buds on the rhizome.

8.   The great moment comes while the wheel is spinning, and he does not yet know the outcome.

9.   The police do not yet know what caused the explosion.