Поставьте the verbs in Passive Voice.

a well-known, needs, to have, know, to transfer, keep, guard, may cause, may be, supported, may support, there are, includes, includes, use.

To be well-known

To be needed

To be had

To be known

To be transfered

To be kept

To be guarded

May be caused

May been

To be supported

May be supported

To be included

To be used

(это лишь предположение. Странное задание.)