Can you imagine that a smart man like him ________ make such a stupid mistake?
I’ll never forget the holiday ______ we spent together.
He entered the room, ______ coat covered with snow.
I ______, but I was prevent by the heavy rain.
Mr. Green drove slowly on the way home until he reached the high way, ______ the speed limit was 60 miles per hour.
We’ll continue to learn by ourselves when we have left school, we must _______ learn how to study in the school now.