are the highlighted words the correct forms for each sentence?

1. In business reports writers must (site, cite, sight) their sources of information. 2. It is (to, too, two) soon to know whether either of the (to, too, two) plans will work 3. My manager checks sales (everyday, every day) as part of his (everyday, every day) routine. 4. After the restructuring, the company (then, than) offered higher salaries (then, than) anyone expected 5. (Their There. They're) going to put their there, they're) backpacks over their, there, they're) near the door 6. News of the merger immediately (effected, affected the stock market 7. Elena was surprised and greatful. grateful) when she received the award. 8. His (principal, principle) reason for taking the job was its location 9. The hotel (formally, formerly known as the Sands (formally, formerly) reopened as the Oasis 10. If there are no (farther, further) objections, we will (precede, proceed) with the agenda items. 11. We should not (infer, imply) agreement with an Asian's head nod; it may merely mean I hear what you are saying 12. The CEO had a (stationery, stationary) bicycle in his office. 13. So frightened was she that her eyes (wavered waivered) from side to side 14 When flames began to (envelop, envelope) the building, firefighters know they were losing the battle 15. Rick was certain he could finish the 16-week (coarse, course)