We must try our （our/ours） best to protect plants．They're important to human beings．
Ann， is this umbrella （you） or Jack's？
It's mine．
The red umbrella doesn't belong to me﹣﹣﹣﹣it's （she）．
﹣My parents work in Yongzhou． What about （you）？
﹣They work in Guangzhou． I'm going to visit them this summer holiday．
Tom and Jerry have a lot in common． Their （they） favorite basketball player is James Hardern．
On Teachers' Day， students usually make cards to thank teachers． （they）
The Communist Party of China （中国共产党） has （it） 100﹣year anniversary this year.
Their house is just like our house， but （we） has a bigger balcony．
Don't always make decisions for your daughter． The choice is （her）．
Your watch is here and m is in the classroom．
Fathers should do more to （they） kids in the modern family．
It's late autumn now． The tree has lost all of leaves． （it）
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