I. 单项选择（20分）
1. It’s a fine day. Let’s have a walk ______ the sunlight.
A. of B. with C. in D. under
【解析】选C。本题考查in the sunlight“在阳光下”这一结构。
2. My plant can’t water ______ .
A. itself B. themselves C. himself D. herself
【解析】选A。本题考查反身代词的用法。plant为植物，所以选itself。
3. My backpack ______ books.
A. is full in B. is filled of C. is full with D. is filled with
【解析】选D。本题考查be filled with或be full of“装满……”结构。
4. When autumn comes, ______ begin to turn yellow and fall off from trees.
A. leaf B. leafs C. leaves D. leafes
【解析】选C。leaf的复数为leaves。
