19.China is a great country with a long history, ______ we all know it.
We __________ back in the hotel now if you didn’t lose the map.
Some people believehas happened before or is happening now will repeat itself in the future.
I found the lecture hard to follow because itwhen I arrived.
--- What time is it? --- I have no idea. But just a minute, I ______ it for you.
The best moment for the football star was _______ he scored the winning goal.