假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的以下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。

增加:在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。

删除:把多余的词用斜线(\)划掉。

修改:在错的词下划一横线，并在该词下面写出修改后的词。

注意: 1.每处错误及其修改均仅限一词;

2.只允许修改10处，多者(从第11处起)不计分。

My mother and I stay at the South Lake Hotel for a week when we visited Beijing last month. It is in the downtown area, and it is easy to go to anywhere from the hotel by public transport. We lived in a comfortably double-room with a big bath. That I liked best were the free high-speed Internet connection in the room. I checked my email messages every day. I also shared for my friends many photos taking in Beijing. The food was wonderful with reasonable prices, and we enjoyed several local dish. It is such great hotel that I would recommend it to my friends who is going to Beijing.

某物体在三个共点力的作用下处于静止状态，若把其中一个力F₁的方向沿顺时针转过90^o而保持其大小不变。其余两个力保持不变，则此时物体所受的合力大小为（   ）

A．F₁；

B．F₁；

C．2F₁；

D．无法确定