The least number of squares that must be added so that the line P-Q becomes the line of symmetry is ______

Nostalgia is to anticipation as _____ is to _____.

Which one of the following options maintains a similar logical relation in the above sentence?

Consider the following sentences :

(i) I woke up from sleep.

(ii) I woked up from sleep

(iii) I was woken up from sleep

(iv) I was wokened up from sleep.

Which of the above sentences are grammatically correct?

When he did not come home, she ___ him lying dead on the roadside somewhere.