31. You will have to ____ some outside help or you will never get the job finished in time.

5.

25. The accident ____ the driver’s carelessness.

(  )53. You can buy items online at the Black Friday price and then get them at the local store.

43. According to the author, why certain foods affect our moods has something to do with ____.

30. There is no light in the dormitory. They must have gone to the lecture, ____?

18. ____ there is something else to discuss, I’ll declare the meeting closed.

10.

22. Mary found ____ extremely difficult to pass the examination.

21. Few people ____ applied for the position meet the requirements of the company.

35. Then your once healthy cell bursts open, releasing new viruses to ____ more cells.

41. The author thinks that ____.