问题
选择题
—Listen! I heard the birds ______ around us.
—Yeah, what beautiful music!
A．sang
B．sing
C．to sing
D．singing
答案
答案：D
略
搜题请搜索小程序“爱下问搜题”
—Listen! I heard the birds ______ around us.
—Yeah, what beautiful music!
A．sang
B．sing
C．to sing
D．singing
答案：D
略