2. Your dentist can help you determine how often you should ---- your teeth ---- and ensure that you use the correct toothbrush. A) get / cleaning' B) have /cleaned. get / clean D) make /cleaned E) have to be cleaned 3. Plants ---- oxygen during photosynthesis, which by living organisms in different ways. A) are released / has utilized B) release/ is utilized C) D) E) released / utilized have released / was utilized are releasing / will utilize 4. Gold B.C. to ---- in dentistry as early as 700 A) was known / be using B) has been known / have used C) is known / have been using D) is known / have used E) is known / have been used 6. Michael Jackson's funeral was said by at least 20,000 people which record as the second most watched funeral ever. A) to have attended / held B) C) to have attended / was held to have been attended / holds D) being attended / is held E) having been attended / have been held 7. The musical Keşanlı Ali Destan, which is a milestone of Turkish theatre, **** on Broadway twice up to now. A) has been staged C) ) E) will have been staged will be staged must be staged was staged 8. As the heart ---- faster, the blood that ---- to the heart per minute is much more than normal. A) is beating / was pumped B) has beaten/pumps C) beats/is pumped D) beats/pumps E) beating/pumped​