--What made your father throw up last night?--I think the large quantities of wine __________.
His ability is beyond question; _____ has been in doubt is ____ he is prepared to work hard
Half of the students will have sports, and the rest _____ to be here in the classroom studying.
She dedicates herself to her work. She is such a dedicated teacher that her efforts will _____.
When she heard that I couldn’t help _____ the problem, the poor girl couldn’t help ____.
______, President Obama is the most powerful in the world.