. From this simple concept ________ that has caused a great change in farming.
| A．has developed a technique | B．has a technique developed |
| C．a technique has developed | D．developed as a technique has |
Neither my wife nor I myself______ able to persuade my daughter to change her______.
| A．is; thought | B．am; mind | C．are; decision | D．am; brain |
In the past decades, sea ice ______ in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |
Susan may have missed her train, in _______ case she won’t arrive for another hour.
| A．that | B．what | C．which | D．whose |
Most of the young girls know they should cut down on fat, but knowing such a thing isn’t of much help when it ______ shopping and eating.
| A．refers to | B．comes to | C．speaks of | D．focuses on |
I don’t know for sure how many of you would like to settle here ---- it is a(n) ______ of personal preference.
| A．affair | B．event | C．matter | D．taste |