John is in a bad mood these days. Do you know why—His grandfather has just passed away. Let’s try to _______.

下列各句中，没有错别字的一项是（ ）

The reason why people carry umbrellas in hot summer days is that____to strong sunlight may be harmful to the skin.[ ]

Tom, would you please the box It’s for your sister.

The Group of Eight(G8)________ the eight richest countries in the world.[ ]