水绵可从下列哪种环境中采集到？[ ]
A．小河的浅水边
B．大西洋的海底
C．潮湿的土坡上
D．海边的洼地
答案：A
The soldier raised his gun and calmly, _____ it at the enemy commander, fired. [ ]
A. aiming
B. Aimed
C. to aim
D. aim \
教学过程的实践离不开教师、学生、评价三要素。
