27. —Who is making so much noise in the garden?

  —______ the children.

A.There are                  B. They are            C. That is                            D. It is

— Were all the passengers in the bus injured in the accident?

  — ______ only four who got hurt.

A. No, there are    B. Yes, there were

C. No, there were   D. Yes, it is

—Who is making so much noise in the garden?

—___________ the children.

A．There are         B．They are          C．That is            D．It is

Please correct the mistakes ________.

A. if there are      B. there are mistakes  

 C. if any        D. if any mistakes

It is fairly common in Africa for     a group of musicians surrounded by others who also join in the performances.