In hot summer, we should pay attention to protecting ourselves __________ strong sunlight.[ ]
Our English teacher often stands _____ front of the classroom. [ ]
Tony and I good friends.
The second season of A Bite of China ________ for a month. It turns out to be the most popular documentary.
. — Why were you so late for work today? — ____ to the office was not very easy this morning because of the traffic.