Obama didn’t explain ______ any larger principles have guided him through the historic convulsions of the 2011 Arab Spring.

Her work changed the way _______ people think about chimps.

There is still some doubt ________ the autumn sports meet will be held in our school, but there is no doubt ________ it will be held soon after our National Day holiday.

(2013·陕西宝鸡二模)The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.

He doesn’t like to be interrupted if he_______ .