下列各句中，没有语病的一句是（ ）

Be careful when you go ____ the streetbecause the trafficis very busy at the moment.

Mr Green didn’t understand ________made his daughterso absent-minded

Only after the incident happened was I conscious ______ his unfriendliness.

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