It was a warm and _______ day.[ ]
A. wind
B. windy
C. cloud
答案：B
As a child, he was so fond of reading that he read every book he could put his________on. [ ]
A. hands
B. arms
C. mind
D. heart
光在______中是沿直线传播的，表示光的传播方向的带箭头的直线叫做______．
