What is the newest problem facing people who drive to school？A．Pollution in the air.B．A la

What is the mentioned cause of the obesity problem of children？A．The food is unhealthy.B．C

What is the problem of the lecture rooms？A．They have poor lighting.B．The capacity is limit

What is considered unnecessary in a letter of complaint？A．What the problem is.B．What corre

What is the problem the modern people are facing

What is the source of the problem?

What is the problem with frogs born in captivity?