You should keep working hard ________ you have passed the exam.

_______ did you sing last night—-About two hours.

I feel very lucky, because what I’ve accomplished in sports is ________ my wildest dreams.

Now , in our country free medical treatment covers sickness of mind as well as sickness.

The fellow has been suspected ________ an email fraud.-Nowadays cybercrime is developing ________ an amazing rate.[ ]