12. The event organizer will be available to answer questions about the------- running the workshops.
(B) presence (C) presented
(D) presenters
(A) present
13. Mr. Carlson has worked ------- to attract investors to his real estate development projects.
(A) persisted (B) persistent
(C) persistence
(D) persistently
14.
of ours will release an array of new consumer products in the coming months.
