下图中虚线为等压线且a大于b，以下四处河岸侵蚀较重且此时最可能出现阴雨天气的是（）
A.甲
B.乙
C.丙
D.丁
参考答案：D
After ______ was about then minutes, the teacher gave the students the correct answer to the question.
A．what
B．that
C．it
D．which
完成句子。
1. 他们匆忙地搬开石头砖块。
They were ________ ________ ________ to move away the bricks and stones.
2.. 它是世界上最重要的湿地之一。
It’s one of ________ ________ ________ ________ wetlands.
3. 人们应该采取行动去保护大熊猫。
People should ________ ________ ________ protect giant pandas.
4. 我们正计划乘地铁去游玩那些名胜古迹。
We are________ to visit the ________ ________ ________ by ________.
