The sinking accident in Korea happened _____ April 16, 2014 and ___ people lost their lives.
—Who’s that at the door? —_____ is John.
如果你向玛丽介绍自己,你应该说:_______
— Your bag looks heavy. Do you need a hand? — . Thanks all the same.
---What are you going to do this weekend?----- I _____ yet.
Which of the following signs can you often see next to a lake?