用方框中所给的词完成下列句子，使句子通顺、正确．每词限用一次．

A．tidy B．empty   C．collect   D．simply   E．produce F．promise

（1）When we make a 　　to others， we should keep it．

（2）It's a good habit to keep your room 　　every day．

（3）I happened to know that my grandpa used to 　　tea sets．

（4）When travelling in Singapore， you can 　　speak Putonghua a lot of the time．

（5）The Chinese company Huawei is always trying to 　　the best smart phones all by itself．

（6）Bob wanted to get something to eat from the fridge， but found it 　　．