23. Thousands of years ago, people killed the wild horse that lived around _____ food. _____ time, people began to catch and raise animals .
| A．for; Through | B．as; During | C．for; Over | D．on; Over |
Good technique in medicine means less pain and fewer deaths;, it is our duty to master it.
| A．thus | B．therefore | C．otherwise | D．however |
Maybe it is time for the rest of society tothe factI may not be able to walk, there are many other great things I can do.
| A．adjust to; that | B．get used to; that while |
| C．adapt to; while | D．go about; that while |
Mr Cooper wanted to buy the house and he told me thatthe house cost, it would beit.
| A．however; worth | B．whatever; worth |
| C．how much; worthy | D．what; worthy of |
The law of Venice says if anyone tries to kill or murder any citizen of Venice, everything that he ownsbe taken away from him.
| A．shall | B．can | C．must | D．may |
You’d better carry a(n)tyre in the back of your car in case it breaks down on the way.
| A．extra | B．free | C．convenient | D．spare |