Science and technology have __________ in important ways to the improvement of agricutural production.
| A．attached | B．assisted | C．contributed | D．witnessed |
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 |
The law of Venice says if anyone tries to kill or murder any citizen of Venice, everything that he owns ________ be 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 |
Is this a book on farming? If so, I want to borrow __________.
| A．this | B．one | C．it | D．the one |
Instead, it seems that creative th
inking is a (n) _________ of habits.
| A．affair | B．business | C．matter | D．problem |