I _______ have met him a long time ago. Both his name and face are very familiar.
Swimmers must be very strong in order to build up speed because of the high resistance of the water. Runners, ____, must struggle against the heavy resistance of the air and ground.
To read newspaper before going to bed seemed to me a rule ____.
It's no secret to us, but he alone is in the dark. It means ____.
Every year, ____ graduates take pan in TOEFL for further education abroad.
In order to ____ the debt, the couple has worked hard for years with little food and only a small room to live in and never a moment's rest.