19．Vitamin D helps our bodies make a special chemical, and this special chemical,________,affects our brains, making us feel happy.
| A．in turn | B．in particular | C．in advance | D．in short |
一Julia，you look upset．What's up？
…The computer break down at this busy hour．I have lots of typing to do．
| A．should | B．can |
| C．may | D．must |
As the job-hunting season is on the way，many graduates from anxiety．
| A．will be suffered | B．are suffering |
| C．were suffering | D．are being suffered |
I am sorry he has not told me his name on the phone because helps if I know who I am talking to．
| A．it | B．he |
| C．one | D．its |
If you go to the wildlife park，you will find the places there more dangerous________ than commonly
| A．supposing | B．suppose |
| C．to suppose | D．supposed |
When you find peace within yourself，you become the type of person who can live peace with others．
| A．in | B．by |
| C．for | D．on |