. 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 |
It doesn't matteryou turn right or left at the crossing ---both roads lead to the park.
| A． | whether | B． | how | C． | if | D． | when |
It’s quite warm here; we __________turn the heating on yet.
| A．couldn’t | B．mustn’t | C．needn’t | D．wouldn’t |
I wish to thank Professor Smith, withouthelp I would never have got this far.
| A． | who | B． | whose | C． | whom | D． | which |
Only after Mary read her composition the second timethe spelling mistake.
| A． | did she notice | B． | she noticed | C． | does she notice | D． | she has noticed |
-You have to believe in yourself. No one else will, if you don't.
-. Confidence is really important.
| A． | It's not my cup of tea | B． | That's not the point |
| C． | I don't think so | D． | I couldn't agree more |