It is not until recently ______ the scientists have found proof of there being water on Mars.
| A．when | B．that | C．how | D．what |
So far this year we ______ a fall in house prices by between 5 percent and 10 percent.
| A．saw | B．see | C．had seen | D．have seen |
He spoke through a microphone , ______ he was clearly heard in the great hall.
| A．even if | B．because | C．in order that | D．so that |
-How do you like our town ?
-_________. It’s worth visiting a second time .
| A．You’ve got it | B．It’s your turn |
| C．It’s fascinating | D．Up to you |
“This month our family has used ______ water as we did last month.” said Mother .
| A．as twice as much | B．more than twice |
| C．twice as much as | D．more than twice as much |
The information tells me that the way of education in Canada is quite different from _____ in China .
| A．one | B．it | C．that | D．those |