—Have you got your exam papers?
—Not yet. I guess they _____ at this moment.
| A．are being graded | B．are grading | C．have graded | D．have been graded |
Only when ________ from work, ________ the truth.
| A．did he return; did we know | B．he returned; we knew |
| C．did he return; we knew | D．he returned; did we know |
We won’t start the work until all the preparations __________.
| A．are being made | B．will be made |
| C．have been made | D．had been made |
The unemployment rate has continued to rise, ________ 9.8 percent in September.
| A．have reached | B．reaching |
| C．to reach | D．to be reached |
_______ they are seeing great development, they are still poorer than many countries in other parts of the world.
| A．Unless | B．Since | C．While | D．As |
Although you _________ find bargains in London, it’s not generally a cheap place to shop.
| A．should | B．need | C．must | D．can |