While dancing happily at home,________.[ ]A.the door bell rangB.the door bell ringsC.we heard the do

题目简介

While dancing happily at home,________.[ ]A.the door bell rangB.the door bell ringsC.we heard the do

题目详情

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
题型:单选题难度:中档来源:江苏模拟题

答案

D

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