Until recently historians assumed that calendars ________ with the advent of agriculture.
| A．came to existence | B．came to existing |
| C．came to exist | D．were existential |
Astronaut Zhai Zhigang has become the first Chinese_______in space.
| A．walking | B．walked | C．to have walked | D．to walk |
---- Are they coming to help us?
---- _______.
| A．I do so | B．I do hope | C．I hope they do | D．I hope so |
_______ some of the wine -- perhaps you will enjoy it.
| A．Trying | B．Try | C．To try | D．Have tried |
This book_______a true story of how one person can make a difference in the lives of other people.
| A．will tell | B．has told | C．tells | D．told |
_______the weather ,the sports meet will be held on time .
| A．Instead of | B．In relation to | C．Regardless of | D．In favor of |