---You look a bit worried .
----It’s raining , but I ________my umbrella at home .
| A．took | B．brought |
| C．left | D．forgot |
It is said that robots can do many things ___ humans can’t do ______the control of computers.
| A．what; under | B．that; with | C．that; under | D．what; with |
--- I wonder _____________without water.
---About a week.
| A．how long man can live |
| B．how long can man live |
| C．when man can live |
| D．when can man live |
The young man came riding full speed down the road on his bicycle._________ it was!
| A．How dangerous the scene |
| B．What dangerous a scene |
| C．How a dangerous scene |
| D．What a dangerous scene |
---He's already back to Australia,__________?
---____________. He is on a visit to Shanghai.
| A．isn't he; No | B．hasn't he; Yes |
| C．isn't he; Yes | D．hasn't he; No |
--- I bought the digital camera two months ago.
--- You mean that you __________ it for two months.
| A．have had | B．have been | C．have bought | D．have taken |