When writing, he often keeps a dictionary____.
The boy asked his mother _______ go out to relax himself or not.
---Excuse me, Dad, but I'm going to the club to meet my friends in the football team. --- Ok. _____.
Paper money was in_______use in China when Marco Polo visited the country in________thirteenth century.
—Do you mind my smoking here? —________
She wears so red clothes that I easily ________ her in the crowd.