题目内容
While dancing happily at home, ________.
[ ]
A.
the door bell rang
B.
the door bell rings
C.
we heard the door bell rings
D.
we heard the door bell ring
答案:D
练习册系列答案
相关题目
题目内容
While dancing happily at home, ________.
the door bell rang
the door bell rings
we heard the door bell rings
we heard the door bell ring