A-A+
A large fish was slowly swimming through the w
问题详情
A large fish was slowly swimming through the water, its tai ______ back and forth like the pendulum of a clock.
A．swung
B．was swinging
C．was swung
D．swinging
参考答案
正确答案：D
解析：非谓语动词。逗号之前为主句，具备完整的主谓结构；逗号后没有连词，但是有主语，因此应该是一个分词独立主格；swing为不及物动词，和tail间为主动关系，所以使用现在分词。
