图中警察手势为左转弯信号。
参考答案：对
– What a beautiful school!
– Yes. Many trees ___________ in our school every year.
A. plant
B. are planted
C. were planted
在高处作业要求中，安全带的使用应（）
A.高挂低用
B.低挂高用
C.高挂高用
D.低挂低用
