Is ________ man’s ability to reason that sets him apart from other animals?      

The aged are close companions, and many of       have known each other for decades. 

--How many eggs are still there in the fridge, Bill? ---_____.

I took ＿＿＿for granted that he would believe in us. 

—Now that you like computers very much, isn’t it a good idea to get ______? —Well, I’d like to but I can’t afford that expensive a computer at present.