下列各句中，没有语病的一句是(　　)

k! What are those boysdoing ______ the table—Well, they are playing cards

How long ____ it take him ____ home —It takes about 15 minutes.

Evidence has been found through years of study _____ children’s early sleeping problems are likely to continue when they grow up.

For many cities in the world, there is no room to spread out farther, _____New York is an example.