It is global warming, rather than other factors,_____ the extreme weather.
| A．that have led to | B．which has caused | C．which are causing | D．that has led to |
Only after Mary read her composition the second time________the spelling mistake.
(2012·天津，6)
| A．did she notice | B．she noticed |
| C．does she notice | D．she has noticed |
Not until he retired from teaching three years ago ________having a holiday abroad.
(2012·辽宁，32)
| A．he had considered |
| B．had he considered |
| C．he considered |
| D．did he consider |
Film has a much shorter history，especially when________such art forms as music and painting. (2012·新课标全国，32)
| A．having compared to |
| B．comparing to |
| C．compare to |
| D．compared to |
It was with the help of the local guide ________ the mountain climber was rescued.
(2013·重庆，27)
| A．who | B．that |
| C．when | D．how |
Read this story，________you will realize that not everything can be bought with money. (2013·四川，4)
| A．or | B．and |
| C．but | D．so |