He may not even drink water at night, _______ swallowing insects possibly floating on the surface.
The students will discuss a number of cases ____ beginners of English fail to use the language properly.
— Sorry to have interrupted you. Please go on.— Where was I?— You ____ you didn’t like your present job.
We consider ____ absolutely necessary that we should open our door to the outside world.
She asked me __________I __________him the night before.
-- Miss Wang ,I hear that you ___________along the Mekong River. Have you got everything ready?--Almost.