--- _____you interrupt now? Can't you see I'm on the phone?
--- Sorry Sir, but it's urgent.
| A．Must | B．Should |
| C．Can | D．Would |
My teacher _____ me the key to the classroom but I’m afraid I _____ it.
| A．had given, lost | B．has given, lost | C．gave, have lost | D．has given, have lost |
---John and Tom, you two clean the classroom today, _____?
---But we cleaned it yesterday.
| A．do you | B．will you | C．didn’t you | D．don’t you |
Pleasant as they made it ______ in Jiuzhaogou, we felt tired after the long journey.
| A．to travel | B．travel | C．travelled | D．travelling |
Although the police thought he was the most likely one, _____ they had no exact proof about it, they could not arrest him.
| A．when | B．until | C．before | D．since |
As we know, _____ medical examination will help us find out health problems as early as possible.
| A．common | B．general | C．regular | D．normal |