—Yesterday I lost my pen. I couldn’t find_______. —Oh, it’s a pity. You’d better buy ________ this afternoon.
Beijing is one of the ______ in the world today.
Eating some vegetables is good ______ your health.
Jim’s parents enjoy _____ in the countryside.
My shoes are cheaper than _____.
_____ he was tired, _____ he didn’t stop to have a rest.