题目内容
It is a good time _____.
A. sing B. to sing C. singing D. sang
B It is a good time to do sth. 是固定句型结构
练习册系列答案
相关题目
题目内容
It is a good time _____.
A. sing B. to sing C. singing D. sang
B It is a good time to do sth. 是固定句型结构