There are many famous cultural relics in our country, many _______ thousands of years ago.
| A．dating back to | B．date back to | C．dated back to | D．were dated back to |
The size of the audience,____ is expected, is more than thirty thousand.
| A．as | B．what | C．that | D．whom |
John did the task____ his sister.
| A．as good as | B．as better as | C．as well as | D．as best as |
_____ he had not been ill , Tom would have won the race.
| A．Unless | B．As | C．If | D．Until |
Stand closer______ you'll be able to see it better.
| A．or | B．while | C．but | D．and |
The teacher never wears anything other than a suit _____ the season.
| A．whatever | B．wherever | C．whenever | D．however |