Next,it is time------- -------- --------the national anthem.(接下来是我们唱国歌的时间了)

问题描述:

Next,it is time------- -------- --------the national anthem.(接下来是我们唱国歌的时间了)

it is time to do sth啊!所以是填to sing

for us to sing

that we sing 应该是强调句型