Every boy and every girl as well as some teachers who ___ to visit the museum _____required to be at the bus station at 6:30.

A．are ; is

B．are ; are

C．is ; are

D．is ;is

请柬是邀请客人时发出的专用信件，又叫请帖。请柬应用广泛，召开联欢会、宴会等许多会议和许多活动都可以发请柬；单位、团体、个人均可以发请柬。