________ happens in the world makes us happy and sad by turns.
In some countries, people eat with chopsticks, while in, knives and forks.
The film star wears sunglasses. Therefore, he can go shopping without ______..
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.