We feel         our duty to make our country a better place.

--- -Your mobile phone is quite nice. Where did you buy __________ ? ---- In Shenzhen .Do you want to have _______ like this? 

________ seems that Mary has known that bad news.

_____is too hard _____ a good solution to this problem.

---Dear me! What a beautiful computer!---My grandma bought ___for my sister and me. It’s ours.