地面大气的水平移动，由风向和风速表示的是( )。
A．风象
B．风速
C．风强
D．风向频率
参考答案：A
They often help the old woman _____ her housework. [ ]
A. in
B. with
C. at
D. on
My sister, as well as one of her classmates who_____ late for class, _____ criticized by Mr. Hunt. [ ]
A. were; was
B. was; were
C. was; was
D. were; were
