1. I wish my house was near Sword Lake

2. Mai wish she could visit her penpal in New York.

3. Most tourists wish Uncle Ho’s Mausoleum opened today.

4. I wish I wasn't busy now

5. I wish my grandma was here now.

Cho tam giác ABC có O là trung điểm AC, E và F thuộc AC sao cho O là trung điểm EF. C/m \(\overrightarrow{BA}+\overrightarrow{BC}=\overrightarrow{BE}+\overrightarrow{BF}\)