通读下面短文，在每小题所给的四个选项中，选出可以填入空白处的最佳答案。

Dear Mike,

How was your school trip? I had1happy school trip with my classmates. We went to Dinghu Mountain. The weather2warm and sunny. All of us were3and happy. We went there4bike. Along the way, we saw lots of interesting things.5took us about an hour to get there. At about nine o'clock we6to climb the mountain. The mountain was so7that we were all tired when we got to the top(顶端). So we sat under a big tree and relaxed. Then we felt8moving in the tree. 9we looked up at the tree, we got a surprise. A monkey was in the tree. He was not scared10us. He even jumped down the tree and played with us.

Yours,

Tina