—Which sweater do you prefer, the yellow one or the pink one?—______. I like a light blue one.

– Which of these two English books will you borrow? – I’ll borrow     of them. Because they are very interesting. 

Your new bike looks nice . Where did you buy ______? I want to buy ______, too.

The man called his professor for help because he couldn’t solve the problem by _________.

   are good friends.